Все способы:
- Способ 1: Поиск в меню «Пуск»
- Способ 2: Приложение «Параметры»
- Способ 3: Утилита «Выполнить»
- Способ 4: «Панель управления»
- Способ 5: Исполняемый файл «Windows Defender»
- Способ 6: Панель с системными уведомлениями
- Решение проблем с открытием «Защитника Windows»
- Вопросы и ответы: 0
Способ 1: Поиск в меню «Пуск»
«Защитник Windows» находится в общем приложении под названием «Безопасность Windows», в котором собраны все средства управления безопасностью в операционной системе, в том числе и антивирус. Попасть в данное приложение можно довольно просто, осуществив поиск через меню «Пуск».
- Откройте стартовое меню, активируйте строку поиска и введите там соответствующий запрос. Дождитесь отображения соответствия и запустите приложение «Безопасность Windows».
- В нем на панели с плитками вас интересует та, которая имеет название «Защита от вирусов и угроз».
- Нажатие по этой плитке перенаправляет в «Windows Defender». В нем вы видите, найдены ли текущие угрозы, когда осуществлялось последнее сканирование и сколько времени оно заняло.
- Вы можете ознакомиться с дополнительными параметрами, обновить систему защиты или перейти к управлению дополнительными настройками. Если нужно переключиться между другими средствами «Безопасности Windows», используйте кнопки на панели слева.
Способ 2: Приложение «Параметры»
Использование приложения «Параметры», пожалуй, считается самым популярным методом перехода к стандартному антивирусу операционной системы. Многие пользователи задействуют именно этот раздел ОС для открытия основных настроек. Давайте разберемся, как отыскать в этом приложении необходимое нам окно, чтобы приступить к работе с «Защитником Windows».
- Для начала откройте «Пуск» и в списке закрепленных значков выберите «Параметры».
- В новом окне на панели слева вам нужен раздел «Конфиденциальность и защита». После перехода к нему выберите категорию «Безопасность Windows».
- В списке «Области защиты» нажмите по первому пункту, который называется «Защита от вирусов и угроз».
- Теперь вы окажетесь в требуемом окне, через которое и осуществляется запуск проверки на наличие вирусов и управление уже найденными угрозами.
- В предыдущем окне категории можете нажать «Открыть службу «Безопасность Windows»», если желаете сначала попасть к общему окну, где будут отображаться все плитки областей защиты, как это было показано в предыдущем методе.
Способ 3: Утилита «Выполнить»
Для реализации данного метода понадобится только ввести одну команду, которая запускает исполняемый файл «Windows Defender», находящийся в системной папке. Проще всего это сделать через утилиту «Выполнить», поэтому запустите ее, используя стандартное сочетание клавиш Win + R. В поле ввода вставьте команду С:\Program Files\Windows Defender\MpCmdRun.exe и нажмите Enter для ее применения. В итоге на экране должно отобразиться окно, о котором шла речь в двух предыдущих способах.
Способ 4: «Панель управления»
Метод открытия «Защитника Windows» с использованием «Панели управления» — не самый быстрый, однако может оказаться полезным для определенных пользователей. В соответствующем приложении понадобится отыскать значок для перехода к разделу, через который и запускается требуемая служба.
- Откройте «Пуск» и через поиск отыщите приложение «Панель управления», затем перейдите к нему.
- В новом окне дважды щелкните левой кнопкой мыши по значку «Центр безопасности и обслуживания».
- Разверните список «Безопасность».
- Осталось только щелкнуть по ссылке «Просмотреть в службе «Безопасность Windows»».
- В итоге вы должны оказаться в необходимом окне с названием «Защита от вирусов и угроз», которое и используется для управления штатным антивирусом.
Способ 5: Исполняемый файл «Windows Defender»
Если по каким-то причинам вы не можете запустить требуемое стандартное приложение через разделы в графическом меню операционной системы, стоит попробовать отыскать исполняемый файл антивируса и самостоятельно открыть его, обойдя тем самым взаимодействие с другими связанными службами и окнами. Для выполнения метода следуйте инструкции.
- Откройте системный раздел вашего жесткого диска и выберите папку «Program Files».
- В этом каталоге отыщите «Windows Defender» и перейдите в папку.
- Вы попадаете в директорию, где хранятся все необходимые файлы для работы «Защитника Windows». Среди них нужно отыскать «MpCmdRun.exe» и дважды щелкнуть левой кнопкой мыши по данному файлу для его запуска.
Способ 6: Панель с системными уведомлениями
Службы безопасности Windows 11 время от времени отправляют пользователю различные уведомления о состоянии своей работы, найденных угрозах и завершенных сканированиях. Вы можете использовать данные уведомления, чтобы быстро перейти к требуемому разделу и управлять «Windows Defender» так, как это нужно именно вам.
- Для вызова панели с уведомлениями в последней версии ОС Виндовс нажмите по текущему времени на панели задач.
- Справа появится целый список. Если в нем есть сообщения от «Безопасность Windows» (не важно, от какого именно компонента безопасности), разверните это уведомление и нажмите левой кнопкой мыши по его тексту.
- Вы будете перенаправлены в службу «Безопасность Windows», но не факт, что сразу в требуемый раздел, поэтому можете вернуться к плиткам «Области защиты» и выбрать там «Защита от вирусов и угроз».
Если вам нужен переход к «Защитнику Windows» с целью отключения его работы, скорее всего, управления активностью исключительно через рассмотренное окно будет недостаточно. Существует вероятность, что проверки все равно будут происходить фоном или антивирус запустится автоматически через какое-то время. Для полного отключения «Windows Defender» понадобится осуществить дополнительные настройки, о которых более детально рассказано в другой статье на нашем сайте по следующей ссылке.
Подробнее: Способы отключения «Защитника Windows» в Windows 11
Решение проблем с открытием «Защитника Windows»
Если вы попробовали все методы, о которых рассказано в рамках данной статьи, но ни один из них не помог открыть необходимое окно управления безопасностью, понадобится отыскать решение обнаруженной проблемы. Оно может крыться как в самой оснастке «Защитника Windows», так и в проблемах операционной системы. При возникновении трудностей мы рекомендуем прочитать специальное руководство от другого нашего автора, чтобы выполнить те или иные действия для исправления ситуации.
Подробнее: Устранение проблем с открытием «Защитника Windows» в Windows 11
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Windows Defender is the default anti-malware program on every Windows PC. Users complain about Windows Defender missing in action from their computers for various reasons. Common causes of such issues include security program conflicts or corrupted files. Interestingly, you can find effective solutions to the Windows Defender missing problem within a few steps. In addition, you can also seek an alternative for safeguarding your data under any circumstance. Let’s solve the problem of the missing Windows Defender.
See also:
Windows Defender Download
Quick Solutions
Microsoft Defender is one of the leading anti-malware services available on Windows. Therefore, it is also referred to as Windows Defender in many cases. However, you may end up missing the Windows Defender on your computer on certain occasions.
You wouldn’t want to miss the most powerful antivirus program associated with Windows 11. Most importantly, it is an essential tool for the safety of your computer from numerous threats such as viruses, malware attacks, spyware, and other issues. If Windows Defender does not work, you don’t have to panic. The following post will outline a few simple solutions for the missing Windows Defender on your Windows 11 PC.
Causes of Missing Windows Defender on Windows 11
The best way to solve the problem of Windows Defender involves the identification of the causes of the problem. Why don’t you see the Windows Defender protecting your system against malicious threats? The most common reasons for the missing Windows Defender include deleted Windows Defender files or conflicts with another security program. Some other reasons are listed below:
- You don’t have the latest updates for Windows 11.
- The time and date on your computer are incorrect.
- You have turned off Windows Defender manually.
- A system configuration error prevents Windows Defender from launching.
- Windows Defender has been turned off due to a Group Policy.
📖Read Also: Windows 11 Virus & Threat Protection Not Working
For example, if you have installed new antivirus software, it can interfere with the working of Windows Defender. Generally, you would find the following common causes for which Windows Defender is not visible on your system.
Full Analysis: Is Windows 11 Need Any Antivirus
Regardless of having built-in Windows Defender, antivirus software is essential to keep malware and spiteful attacks at bay! Consider using the EaseUS Todo Backup tool for complete PC protection.
How to Fix Windows Defender Missing Windows 11 Problem
As you can notice, the different causes for the missing Windows Defender problem are pretty trivial. With a keen eye for detail, you can identify these causes and resolve the issue with simple troubleshooting methods. For example, you can try resetting Windows Defender as the first solution. However, if you don’t find any likely results with the simple solutions, you can try the following solutions.
- Method 1. Re-enable Windows Defender If It’s Disabled
- Method 2. Restart Your System
- Method 3. Check for System Updates
- Method 4. Download and Run Microsoft Safety Scanner
- Method 5. Reinstall Defender from the Microsoft Website
Method 1. Re-enable Windows Defender If It’s Disabled
You can use the following steps to enable Windows Defender manually if it has been disabled by accident.
Step 1. Open «Settings» and access «Privacy & Security».
Step 2. Select «Windows Security» and click «Virus & threat protection».
Step 3. Open the Manage Settings link and enable «Real-Time Protection with Windows Defender».
Method 2. Restart Your System
One of the standard solutions for almost every problem is to restart your system. Here are the simple steps to restart your system.
Step 1. Save all your work.
Step 2. Click on the «Windows» button
Step 3. Then click on the «Power» button, and then choose the «Restart» option.
Method 3. Check for System Updates
The lack of the latest updates can also be one of the common reasons for Windows Defender not working on your system. Here are a few easy steps to check for Windows updates.
Step 1. Open Windows settings using «Win» and «I» keys.
Step 2. Find «Windows Update» on the left-hand side of the screen and click on it.
Step 3. Look for the «Check for updates» option and click on it for running Windows updates manually.
Method 4. Download and Run Microsoft Safety Scanner
Microsoft Safety Scanner is a powerful tool tailored to identify and remove malware from Windows systems. You can download it and run a scan with the following steps.
Step 1. Download Microsoft Safety Scanner from the official Microsoft Support website and complete the installation process according to the instructions.
Step 2. Once you have completed the installation process, you will find three different scanning options: Quick scan, Full scan, and Customized scan.
Step 3. Depending on the type of scan you select, the Microsoft Safety Scanner would take several minutes for the scanning process.
Method 5. Reinstall Defender from the Microsoft Website
If the above solutions don’t work out, you must choose the final resort, i.e., reinstalling Windows Defender. Microsoft Defender is not available directly through the website, but you can download it using Windows terminal or PowerShell.
Step 1. Open Windows Terminal with admin permission.
Step 2. Copy-paste the following command and press the Enter key.
Get-AppxPackage Microsoft.SecHealthUI -AllUsers | Reset-AppxPackage
Step 3. It will install and fix any problem related to Defender in Windows.
Once done, search for Windows Defender in the Start Menu and open it. Make sure to setup the real-time protection.
Keep Data From Viruses Attack Even Windows Defender Go Missing
The problem of missing Windows Defender can have critical consequences for your computer. Without the default anti-malware protection tool, your system will likely be vulnerable to viruses and malware attacks. However, you need to note that whether you solve the issue of a missing Windows Defender or not, your data is at risk.
Therefore, your priority should be safeguarding your data above everything else. EaseUS Todo Backup tool can offer an exclusive opportunity for you to relax regarding data backup and security.
EaseUS Todo Backup is a powerful, one-stop destination for all your data backup requirements. You can easily take data backup from disks, files, operating systems, and partitions and store it according to your preferences. It also ensures easier data recovery to ensure you always have control over your data. However, the most crucial feature of EaseUS Todo Backup is called Security Zone. It’s a tool that creates a secret partition on your computer that cannot be explored or changed by the user or third-party apps or the Windows itself. This feature allows EaseUS Todo Backup to help protect your important data from ransomeware.
You can follow the steps listed below to keep your data from viruses attack even Windows Defender go missing.
Step 1. Select Backup Contents
On the main window, click the big question mark button to select backup contents. You can choose to back up individual files, entire disk or partition, operating system and mails.
Step 2. Select Security Zone as Backup Destination
While selecting backup destination, you can see the Security Zone option. Click Security Zone and use it as a backup destination.
However, if you’re first to use the Security Zone function, EaseUS Todo Backup will guide you to create one. Click «Create Security Zone«.
Choose a partition with enough free space for your backups and then click «Continue«.
You can adjust the partition size for the security zone. Click «Create» to get it done.
Step 3. Execute the backup task
Click «Backup Now» to start the backup process. Your backups of OS, files, drives and mails in the security zone will be fully protected from being seen or destroyed by virus, ransomeware and trojan.
Bottom Line
The curious case of a missing Windows Defender can be annoying and troublesome if left unchecked. You don’t want to risk your valuable data to unprecedented malware attacks, viruses, or other threats. Therefore, you must identify the causes of the problem, such as a conflicting security program. Subsequently, you must implement the necessary troubleshooting methods and check whether Windows Defender works. Above everything else, you can ensure secure backup of your data with EaseUS Todo Backup, a reliable tool for safe data backup and recovery.
In a rapidly evolving digital landscape, device security has become an essential pillar of personal computing. For millions of Windows 11 users, Microsoft Defender acts as the primary gatekeeper against an ever-expanding array of viruses, malware, and nefarious cyber threats. While many recognize the presence of this security solution—deeply embedded within the operating system—few truly understand its capabilities, the straightforward process for activation, and the critical nuances to consider when configuring it in conjunction with other software. This article provides a comprehensive, step-by-step exploration of how to turn on Microsoft Defender in Windows 11, cross-examines its strengths and limitations, and contextualizes its role in modern cybersecurity.
Understanding Microsoft Defender: Built-In Protection for Windows 11
Microsoft Defender, once known as Windows Defender, has evolved significantly from its humble origins as a basic anti-spyware tool in earlier versions of Windows. Today, it is a sophisticated suite of security features pre-installed with every fresh Windows 11 installation. Official Microsoft documentation confirms that Defender provides real-time protection, threat analysis, and automatic updates, serving as a first line of defense against many prevalent cyber risks.
Defender is engineered to work seamlessly in the background, requiring minimal user intervention. However, some scenarios—such as the installation of a third-party antivirus product—can cause Defender to turn itself off. This is neither a sign of malfunction nor an error: per Microsoft’s guidelines, this behavior prevents software conflicts. The drawback, however, is that some users inadvertently leave their systems without any active security solution if third-party protection isn’t properly configured or expires.
Why Keeping Defender Active Matters
It is well-documented by both Microsoft’s official resources and independent security labs that running Defender provides essential baseline security for home users. The software offers:
- Real-time scanning of files, apps, and processes.
- Heuristic analysis to detect both known and emerging threats.
- Periodic security updates delivered through Windows Update.
- System-level protections like controlled folder access and ransomware mitigation tools.
Multiple security reports—including quarterly analyses by AV-Test and AV-Comparatives—have recognized Defender for achieving near-parity with commercial antivirus products in categories such as malware detection, performance impact, and false positive rates. For example, AV-Test’s 2024 evaluations consistently rate Defender in the upper echelon of free antivirus programs. While some paid tools may offer advanced features like VPN integration or identity theft monitoring, Defender’s core utility for everyday users remains significant and verifiable.
Step-by-Step: How to Turn On Microsoft Defender in Windows 11
Activating Microsoft Defender is both intuitive and user-friendly, a purposeful design decision from Microsoft to encourage universally accessible PC security. Here is a detailed, independently verified guide on enabling Defender’s protections in Windows 11.
Step 1: Open Windows Settings
Begin by right-clicking the Start button on the taskbar. Select Settings from the context menu. Alternatively, you can use the shortcut Windows + I to launch Settings directly.
Step 2: Navigate to Privacy & Security
Within the Settings application, locate the left-hand menu and click on Privacy & security. This section consolidates all settings pertinent to device integrity and user privacy.
Step 3: Access Windows Security
Under the Privacy & security menu, you will find Windows Security. Click on it to delve into system security management.
Step 4: Firewall & Network Protection
Once inside Windows Security, choose Firewall & network protection. This dashboard lets you monitor and adjust your device’s firewall settings across different network profiles.
Step 5: Select the Active Network
You will see options for Domain network, Private network, and Public network. The active connection is typically highlighted. Click on the profile that denotes your current network (often “Public network” if you’re on Wi-Fi outside home or work).
Step 6: Toggle Microsoft Defender Firewall
Locate the Microsoft Defender Firewall switch. Toggle it to the ‘On’ position. If prompted by a User Account Control dialog, click Yes to confirm the change.
Step 7: Repeat for All Networks
For comprehensive security, repeat the previous two steps for all listed networks—ensuring Defender Firewall is enabled across domain, private, and public profiles.
These steps have been corroborated by multiple independent tutorials, including official Microsoft support articles and trusted tech media outlets such as Techloy and Windows Central. The interface may evolve slightly with system updates, so users are encouraged to check for any interface changes following major Windows 11 feature releases.
Troubleshooting: Common Roadblocks and How to Resolve Them
While turning on Defender is generally straightforward, several issues may complicate activation. Recognizing these obstacles—and their remedies—is critical for effective protection.
Conflict with Third-Party Antivirus Products
If any non-Microsoft antivirus software is detected, Defender will automatically turn off many of its functions. This is validated by Microsoft’s official documentation on Defender’s cooperative mode, which is intended to prevent double scanning and potential software errors.
If you wish to revert to Microsoft Defender as your primary security tool, you must fully uninstall the third-party antivirus application. Merely disabling it is insufficient; only full uninstallation will prompt Defender to reactivate. After removal, restart your PC and reattempt the steps outlined above.
Group Policy or Registry Modifications
In some cases, organizational limits or user-customized settings via Group Policy Editor or the system registry may disable Defender or lock certain protections behind administrator permissions. If you are on a managed device (such as in corporate or educational environments), you may need to contact your IT administrator. For personal PCs, restoring default policies via the Group Policy Editor or resetting relevant registry keys can resolve these blocks, though these processes should be approached with caution to avoid unintended system instability.
Error Messages and Disabled Components
Occasionally, users report error messages indicating that “Microsoft Defender Antivirus is turned off by group policy” or that “Your virus and threat protection is managed by your organization.” In most home environments, these are the result of previous manual tweaks or incomplete removal of older antivirus products. Microsoft provides specific troubleshooting guides that involve running the Windows Security Troubleshooter or using tools like Windows PowerShell to reset Defender’s configuration (“Set-MpPreference -DisableRealtimeMonitoring $false” is a commonly cited PowerShell command for such cases, but always validate the command usage in your context).
Validating Defender’s Status: Is Your PC Protected?
After enabling Microsoft Defender, it is prudent to verify that all components are active. This can be done by opening the Windows Security dashboard and checking the Virus & threat protection section. You should see status indicators stating “No action needed” and “Protection is on.” The Firewall & network protection area should similarly confirm that all profiles are protected.
For more technical users, Windows PowerShell and the Command Prompt can be leveraged for additional confirmation:
- Open Windows PowerShell as an administrator.
- Type
Get-MpComputerStatusand press Enter. - This command displays the operational state of all Defender modules—including real-time protection, anti-spyware, antivirus, and definition update statuses.
Cross-referencing this status with Windows Event Viewer logs provides further assurance, as Defender will log detection and scan events under the “Microsoft-Windows-Windows Defender/Operational” log listing.
Evaluating the Strengths of Microsoft Defender
Seamless Integration with Windows 11
Defender’s greatest advantage is its native integration with Windows 11. Unlike many third-party solutions, Defender does not encroach on system performance or request aggressive upselling for premium features. Its automatic updates via Windows Update ensure that the virus definition database and scanning engines are constantly refreshed, reducing the risk of “zero-day” vulnerabilities.
Minimal Impact on Performance
Recent independent tests—such as those performed by AV-Test—show that Defender’s background operations consume less RAM and CPU than some traditional antivirus utilities, particularly during passive operation. While full scans can cause a temporary spike in resource usage, this is align with market norms and can be scheduled for off-peak hours.
No Hidden Fees or Subscriptions
Perhaps the most underappreciated benefit is that Microsoft Defender is fully free for all Windows 11 users. There are no hidden charges, upsells, or required subscriptions, unlike some free antivirus products that bundle unrelated utilities or serve ads to supplement their revenue streams.
Strong Detection and Response Capabilities
Defender consistently ranks high in malware detection rates. In head-to-head laboratory testing, it matches or exceeds detection rates for popular threats when compared against established industry leaders. Of particular note are its advanced heuristic and machine learning capabilities, which have shown increasing effectiveness as part of Microsoft’s cloud-based threat intelligence network.
Areas of Caution and Potential Drawbacks
Limited Advanced Features
Defender, while robust for general malware protection, excludes some specialist features offered by multifaceted commercial suites. These include built-in VPNs, encrypted password vaults, secure file shredders, and comprehensive parental control modules. Users who desire such tools will need to seek third-party applications.
Occasional False Positives
Historically, Defender has shown occasional tendencies to flag certain safe files as malicious—particularly scripts, installers, or custom enterprise utilities. While these rates are generally lower than in earlier years and are steadily improving, some advanced users may find the lack of granular exclusion options frustrating.
Reliance on Cloud Connectivity
Defender increasingly utilizes Microsoft’s cloud intelligence framework for rapid threat identification and mitigation. While this creates up-to-the-minute protection against emerging risks, it does mean that users without regular internet connections may experience reduced efficacy.
Not a Substitute for All Security Practices
No antivirus, including Microsoft Defender, is a panacea. Good security hygiene—such as regular system updates, strong unique passwords, multifactor authentication, and prudent software downloads—remains equally important.
The Defender Firewall: An Overlooked Security Layer
Beyond antivirus, Defender incorporates a powerful software firewall, controlling incoming and outgoing network traffic. This firewall is enabled through the same Windows Security dashboard. Studies indicate that the majority of unauthorized access and ransomware attacks leverage weaknesses in unprotected networks or poorly managed firewall rules. Ensuring that Defender’s firewall is enabled for all network profiles—public, private, and domain—is a simple yet profoundly effective method to reduce this risk.
Every time a new application attempts to access the internet, users are prompted to allow or block access—a clear, comprehensible mechanism for controlling data flow. However, expert users can delve deeper into specific port and IP filtering by editing advanced firewall rules, enabling precise control.
Defender Updates and Feature Evolution
Microsoft has committed to continually enhancing Defender through frequent updates. These updates are delivered via Windows Update and classified as critical, ensuring Defender evolves alongside the growing sophistication of cyber-attacks. Notably, Microsoft’s recent rollouts have added features such as Tamper Protection—which safeguards Defender settings from unauthorized changes—and Potentially Unwanted App (PUA) Blocking.
Following Windows 11’s ongoing updates, users should regularly verify that both their operating system and Defender’s virus definitions are current. This is typically automated, but a manual check can be performed from the Virus & threat protection tab by clicking “Check for updates.”
Special Cases: When Microsoft Defender Might Not Suffice
While Defender is more than adequate for most users, there are special circumstances—such as high-risk internet behaviors, small business endpoints, or environments with custom compliance requirements—where a more comprehensive solution is warranted. Users dealing with highly sensitive information, financial transactions, or enterprise-level data may choose to supplement Defender with additional layers of protection such as endpoint detection and response (EDR) tools, hardware security keys, or specialized encryption services.
It is also important to reiterate that, as Microsoft Defender disables itself when another antivirus product is installed, users must take responsibility for ensuring that at least one active protection system is continuously operational.
Verdict: Defender as the Default, Not the Only Line of Defense
In sum, Microsoft Defender stands as a reliable and highly accessible solution for everyday PC users seeking baseline security against malware and network intrusions on Windows 11. Its hassle-free operation, negligible performance impact, and credible protection metrics make it a compelling default choice.
However, savvy users should remain alert to its relative limitations compared to certain paid suites and always adhere to broader cyber-safety principles. Periodic verification that Defender is enabled and updated, along with judicious management of software installations, gives most users a security foundation that is both robust and cost-effective.
Activating Microsoft Defender on Windows 11 is more than just a checkbox—it is a foundational security practice. By understanding how to enable and verify its features, and by recognizing when further layers of protection might be necessary, users can ensure their digital experience remains as safe as it is seamless. The modern security landscape may be daunting, but with Microsoft Defender at your side—and a clear understanding of its intricacies—you are equipped to face the challenge with confidence.
Source: Techloy How to Turn on Microsoft Defender in Windows 11
This PowerShell command reinstalls Windows Defender in seconds
Updated on September 22, 2022
What to Know
- You don’t need to download Windows Defender, because it’s integrated into Windows 11.
- Enter this in a PowerShell window: Get-AppxPackage Microsoft.SecHealthUI -AllUsers | Reset-AppxPackage.
- Or, go to Settings > Apps > Installed apps > Windows Security > three dots > Advanced options > Reset.
This article explains when and how to reinstall Windows Defender through the command line or Settings app in Windows 11.
How to Reinstall Windows Defender in Windows 11
Windows Defender (aka, Microsoft Defender) isn’t installed on your computer like a typical program, so you can’t reinstall it like you can regular software. Instead, follow these directions to use a PowerShell command to get the job done. It might take anywhere from 5 seconds to a few minutes to complete. If you can open Settings normally, there’s an easier method after these steps.
-
Right-click the Start button and select Terminal (Admin).
If that doesn’t work for whatever reason, use the search bar on the taskbar to search for PowerShell, and then right-click it to find the Run as administrator option.
-
Copy the command exactly as it’s shown here, and then right-click in the PowerShell window to paste it (Ctrl+V works, too):
Get-AppxPackage Microsoft.SecHealthUI -AllUsers | Reset-AppxPackage -
Press Enter to immediately start the process to reset Windows Defender to its original settings so that it performs as a freshly installed app.
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You’ll know when it’s finished because you’ll see the blinking cursor again on a new line below the command you entered. In the meantime, you might briefly see a Deployment operation progress message.
If you see lots of red text, and an «Access is denied» message, return to step 1 and make sure you’re opening PowerShell as an administrator.
Another way to reset Windows Defender is through Settings. If Settings opens fine for you, you don’t need to bother with a PowerShell command. Instead, go to Settings > Apps > Installed apps > Windows Security > three dots > Advanced options > Reset.
When to Reinstall Windows Defender
Technically, you’re not really reinstalling the program because Windows doesn’t actually let you uninstall it. That said, you might run the above command to reset Windows Defender if it’s just not working correctly.
The most obvious sign you need to do this is if you see an error when you try to open it. If it’s not opening as it should, and you see this message, the above command should fix it right away:
You'll need a new app to open this windowsdefender linkLook for an app in the Microsoft Store
Or, maybe it does open, but some of its toggles won’t turn on or off, or you can’t even find a link to it on your computer. In these cases, the PowerShell command should refresh the tool back to working order.
Windows Defender Might Just Be Off
It’s possible that you’ve considered reinstalling Windows Defender because it isn’t catching malware, when in reality, it’s just not turned on. You might think it’s been uninstalled or is broken, but really it’s just disabled.
This is completely possible since Windows 11 lets you turn off its built-in antivirus program if you’d rather not use it.
Learn how to turn Windows Defender on and off for specific directions.
FAQ
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Not really. While Windows Defender provides basic protection from threats, it’s no substitute for third-party antivirus software.
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Go to Start > Settings > Privacy & Security > Windows Security > Virus & threat protection. Under Virus & Threat Protection Settings, select Manage settings, then under Exclusions, select Add or remove exclusions.
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Безопасность Windows — это встроенный системный антивирус Windows 11, который обеспечивает непрерывную защиту компьютера от вредоносных программ, вирусов, троянов и других угроз. Многим он знаком как Windows Defender или Защитник Windows по предыдущим версиям операционной системы Windows. Этот антивирус практически ни в чем не уступает платным антивирусам, автоматически обновляется, в фоновом режиме проверяет устройство на наличие проблем с безопасностью. В этой статье мы расскажем о четырех способах, которые помогут вам в Windows 11 открыть антивирус Безопасность Windows.
Способ 1: Значок на панели задач
Если никакие изменения в автозагрузку приложений на компьютере не вносились, то проще всего открыть антивирус Безопасность Windows, нажав на значок щита на панели задач. Это самый быстрый и доступный способ.
Способ 2: Поиск на панели задач
- Нажмите на панели задач на строку поиска или кнопку в виде лупы.
- Начните вводить Безопасность Windows и нажмите клавишу Enter или кликните по соответствующему результату, отображающемуся в результатах поиска на первом месте.
Способ 3: Кнопка Пуск
Если вы хотите быстро открыть антивирус Безопасность Windows, вы можете найти его в списке установленных приложений. Для этого сделайте следующее:
- Нажмите на кнопку Пуск с логотипом Windows на панели задач.
- Затем нажмите на кнопку «Все приложения».
- Прокрутите список установленных приложений до буквы Б.
- Нажмите на приложение «Безопасность Windows».
Способ 4: Приложение Параметры
Приложение Параметры — это центр настройки и персонализации Windows 11. Чтобы открыть Безопасность Windows через приложение Параметры, выполните следующие шаги:
- Откройте приложение Параметры (клавиши Win + I).
Как открыть Параметры в Windows 11?
Еще несколько способов перейти в настройки операционной системы.
- На левой панели нажмите на раздел «Конфиденциальность и защита».
- Затем на правой панели перейдите в подраздел «Безопасность Windows».
- Нажмите на кнопку «Открыть службу Безопасность Windows».
После этого вы перейдете к антивирусу Безопасность Windows, где сможете просмотреть актуальную информацию о состоянии защиты вашего компьютера и управлять различными компонентами безопасности, такими как антивирус, брандмауэр, контроль учетных записей и т.д.
Какой способ вам понравился больше? Знаете другие способы открытия антивируса «Безопасность Windows»?
Расскажите в комментариях 😉