В Windows 10 и Windows 11 есть встроенный (и довольно неплохой) антивирус Microsoft Defender Antivirus (Защитник Windows), управляемый через панель Безопасность Windows. В некоторых случаях Windows Defender или панель управления Безопасность в Windows перестают открываться, вместо диалогового интерфейса показывается пустое белое окно, приложение не запускается при вызове через панель Settings или командой быстрого доступа
ms-settings:windowsdefender
. В этой статье мы рассмотрим, как исправить типовые ошибки, когда не удается открыть окно службы безопасности Windows Defender.
В первую очередь проверьте, не уставлен ли в Windows сторонний антивирус. Windows Defender в панели безопасности Windows автоматически отключается при использовании не-Microsoft антивируса. Решите какой антивирус вы хотите использовать в дальнейшем, если нужно оставить защитник Windows, удалите сторонний антивирус.
Если при запуске Windows Security (Windows Defender) через меню Параметры (Settings -> Update & Security -> Windows Security), появляется окно с предложением выбрать программы для открытия ссылки “
You’ll need a new app to open this Windowsdefender link
”, проверьте что UWP приложение Microsoft.SecHealthU установлено. Именно UWP приложение Windows Security (Windows Defender) отвечает за отображение окна Безопасность Windows.
Если нужно сбросьте его настройки. Подробно это описывалось в статье Вам понадобится новое приложение, чтобы открыть эту ссылку WindowsDefender.
Get-AppxPackage Microsoft.SecHealthUI -AllUsers | Reset-AppxPackage
Убедились, что в Windows запущены все службы Microsoft Defender. В Windows должны быть запущены следующие службы:
- Microsoft Defender Antivirus Service (
WinDefend
) - Windows Security Service (
SecurityHealthService
) - Security Center (
wscsvc
)
Можно проверить список запущенных служб Защитника Windows через панель управления services.msc или с помощью PowerShell:
get-service WinDefend, SecurityHealthService, wscsvc | select name,status,starttype
Если службы отключены, измените тип запуска на Automatic и перезагрузите компьютер.
Службы Windows Defender Firewall (mpssvc), Microsoft Defender Antivirus Network Inspection Service (WdNisSvc) и Windows Defender Advanced Threat Protection Service (Sense) не являются обязательными для работы панели управления Security.
В панели управления безопасностью Windows может висеть надпись “Cлужба работы с угрозами остановлена, перезапустите ее”. Чтобы исправить такую ошибку Defender, следуйте этой инструкции.
В Windows 10 и 11 Microsoft Defender автоматически выключается, если на устройстве установлен сторонний антивирус. Если стороннего антивируса, нет, а Microsoft Defender отключен, значит кто-то очень сильно постарался, чтобы его отключить.
Начиная с Windows 10 2004 (в том числе в Windows 11) вы не можете просто отключить Microsoft Defender с помощью:
- ключей реестра DisableAntiVirus=1 и DisableAntiSpyware = 1 (HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender);
- или параметра GPO Turn off Microsoft Defender Antivirus в Computer Configuration -> Administrative Templates -> Windows Components -> Microsoft Defender Antivirus.
Для отключения Защитника Windows сначала придется отключить функцию защиты Microsoft Defender Tamper Protection в настройках Microsoft Defender.
Можно проверить, отключена ли защита антивируса Defender с помощью PowerShell:
Get-MpComputerStatus | select IsTamperProtected
В данном примере
IsTamperProtected=True
, это значит, что защита Windows блокирует отключение Microsoft Defender.
В более ранних версиях Windows 10, проверьте значение указанного выше параметра локальной групповой политики с помощью редактора gpedit.msc (параметр должен быть установлен в Не задано или Отключено) или с помощью PowerShell:
Get-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\Windows Defender' -Name DisableAntiSpyware
Get-ItemProperty -Path 'HKLM:\SOFTWARE\Policies\Microsoft\Windows Defender' -Name DisableAntiVirus
Если команда вернет значение параметров =1, значит Microsot Defender отключен. Чтобы включить Защитник Windows, удалите параметр или измените значение на 0.
Проверьте и установите последние обновления Windows Settings -> Update & Security -> Windows Update -> Check for updates или с помощью PowerShell.
Если ничего не помогло, проверьте и исправьте целостность образа Windows командами:
sfc /scannow
и
DISM /Online /Cleanup-Image /RestoreHealth
Инструкции из этой статье должны восстановить работу службы Безопасность Windows.
If you’ve recently been hit by a virus or malware attack and notice that the Windows Defender Security Center Service is gone from the services.msc on your Windows 11 or 10 PC, it’s a pretty serious issue you’re facing right now. This means that Windows Defender is not active at the moment to protect your computer and you might be at risk for more attacks.
In this post, we’ll talk about why this happens and show you some steps to get the missing Windows Security Center Service back.
What is the problem?
Here’s the issue: you try to turn on Windows Defender after a malware mess, and get a message saying, “Security at a glance – Page not available” when you try to look at the Windows Security settings. When you peek into Services.msc, the Windows Security Center Service isn’t there, which means you can’t turn on Windows Defender.
Sometimes, you might even see a pop-up saying “You’ll need a new app to open this windowsdefender link” when trying to open the Windows Security settings.
Well, there are a few things that can cause this issue. In most cases, it’s because of a very intelligent virus or malware that has messed up your Security Center service and making it disappear so you cannot turn it on. The very first thing you should try is to restart your computer and see if the service comes back. If not, proceed to the following solutions.
Related issue: Windows 11 Security Tab Missing in Properties
How to fix Windows Security Center Service not found issue
Well, there are a few workarounds to fix the missing Windows Security Center Service issue. We’ll go through the fixes below.
Reinstall Windows Defender
First off, try reinstalling Windows Defender. This can bring back all the needed services for Windows Defender and Security Center. You can do this with a few methods, like using a simple PowerShell command. Give this a shot first and see if it sorts out the problem. If not, move on to the next step.
Restore Windows Defender Service using registry
If reinstalling didn’t help, you can get the Windows Defender Service back in Windows 11 or 10 using a registry file. But, you’ll need to start regedit.exe as TrustedInstaller first.
Also see: Windows Registry Key “Access is Denied” Error
Run regedit.exe as TrustedInstaller using Advanced Run
Advanced Run is a very useful tool from Nirsoft that lets you run programs with extra permissions, like as an administrator or TrustedInstaller. It’s great for when you need special access to run certain programs, such as this situation now. With Advanced Run, you can start regedit.exe as TrustedInstaller to add the registry key needed to get the Windows Defender Service back.
- Get Advanced Run from Nirsoft and unzip it somewhere on your computer.
https://www.nirsoft.net/utils/advanced_run.html
- Open the folder and double-click on the “AdvancedRun.exe” file.
- Hit the “Browse” button and find the Registry Editor executable file (regedit.exe) or type in the path: “C:\Windows\regedit.exe“.
- In the “Run As” section, pick “TrustedInstaller” from the list.
- Press the “Run” button to open regedit.exe as TrustedInstaller.
Import the Windows Defender Service restoration registry file
With regedit.exe running as TrustedInstaller, you can now add the registry file to get the Windows Defender Service back.
Warning: Messing with the registry can be risky. If you’re not sure, it might be better to ask for help from someone who knows what they’re doing. Always make a system restore point or back up the registry before changing anything, just to be safe.
- Download our restore Windows Defender service registry fix.
- Unzip the file (better to do it on the C: drive).
- In the Registry Editor, click File and choose Import.
- Find the registry file for your version of Windows. If you’re on Windows 11, pick the RestoreWindowsDefender-Windows11.reg file.
- Click Yes when asked for confirmation.
- Close the Registry Editor and restart your computer.
After a restart, check if the Security Center Service is back. If it is, make sure to update Windows Defender right away.
If the Security Center Service is still missing, you might have to think about resetting or doing a clean install of Windows 11/10.
Reset or clean reinstall Windows 11/10
If nothing else worked, you might need to reset or do a clean install of Windows 11 or 10. Resetting Windows lets you keep your files (not all files) but removes apps and drivers, while a clean install wipes everything and starts fresh. These steps might take some time but can help restore the missing Windows Defender or Security Center service.
But, a clean install should always only be considered as a last resort. And always back up your important files that you couldn’t afford to lose before doing so.
Repair Windows Security services with SFC and DISM
When things like this happen, it’s a common practice to try running the SFC (System File Checker) and DISM (Deployment Image Servicing and Management). This is to fix any corrupted or missing system files, which include things like the Windows Defender Security Center Service.
To run SFC, open Command Prompt as an admin and type “sfc /scannow” then press Enter. It might take a while, but it will tell you if it found and fixed any issues.
To run DISM, open Command Prompt as admin and type “dism /online /cleanup-image /restorehealth” then press Enter. This scan can also take a bit but can help fix system image issues.
What to do if the Windows Security Center Service disappears again
If the Windows Security Center service vanishes again, it might mean your computer is still under attack by the same or different malware. In this situation, you’ll have to react quickly and use a trusted antivirus to run a full scan on your system. Pick a well-known antivirus that’s good at finding and getting rid of malware and viruses.
If it finds anything, follow the antivirus’s advice to remove the malware. After the threats are gone, you can try to get the Windows Security Center service back again.
Some final words
To prevent similar issue from happening again, keep everything updated, use reliable antivirus software, and be careful online. Avoid sketchy websites, don’t download stuff from people you don’t trust, and watch out for scams. We hope this guide helps you fix the missing Windows Defender Security Center Service issue.
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Did you encounter a Windows Defender service access denied error? Here is all you should know.
Windows Defender is one of the most popular antivirus programs, protecting millions of computers against vicious threads. However, many users report that their Windows Defender cannot be started.
Often, when users try to start Microsoft’s built-in antivirus, an error message appears on the screen informing them that the service couldn’t be started. There are a few ways to fix this.
Why can’t the Windows Defender service be started?
Many Windows 10 users reported that the Windows Defender service wouldn’t start on their PCs. Here are a few reasons why this may happen:
- Incompatible antivirus – Some users prefer third-party antivirus. If the choice does not work well with the built-in Windows Defender, you may expect this error.
- A corrupted account – Your login account may be corrupt and will trigger this Windows Defender service access denied error.
- Corrupted app files – If the app files are bad, you will also not be able to start its services, leading to the error.
Moreover, here are some other similar issues that users reported:
- Windows Defender service won’t start in Windows 11, 10, 7 – Even if you don’t use Windows 10, you should know that almost all of our solutions are compatible with older versions of Windows, so feel free to try them.
- Windows Defender service won’t start error 577 – Sometimes, error 577 can appear while trying to start Windows Defender service. To fix this problem, ensure you don’t have any third-party antivirus installed on your system.
- Windows Defender Security Center won’t open – Several users reported that Windows Defender Security Center won’t open or work at all. To fix this issue, check if you have the latest updates installed.
- Windows Defender service won’t start access denied – This problem can appear due to issues with your permissions. To fix the problem, you need to adjust the security permissions of the ProgramDataMicrosoft directory.
- Windows Defender service keeps stopping – If Windows Defender service keeps stopping, the issue might be profile corruption. Create a new user profile and check if that solves the problem.
How can I fix the Windows Defender service not found/access denied errors?
1. Disable and remove third-party antivirus solutions
Running two antivirus solutions at the same time causes various technical issues. Use dedicated software removal tools to eradicate any third-party antivirus files.
For example, IObit Uninstaller is an excellent choice. This tool can remove all unwanted programs with their associated files, leaving no trace behind, as IObit will scan and display logged programs, folders, registries, etc, to delete them with just a right-click.
IObit Uninstaller
Remove unwanted programs and keep your computer safe and clean with this powerful tool.
2. Install the latest Windows Updates
- Press Windows Key + I to open the Settings app.
- Now go to the Update & Security section.
- Click the Check for updates button.
Windows will now check for available updates and download them in the background. Once the updates are downloaded, restart your PC to install them.
3. Run an SFC or DISM scan
3.1 SFC Scan
- Press Windows Key + X and select Command Prompt (Admin) or Powershell (Admin).
- When Command Prompt opens, enter the following command and press Enter:
sfc /scannow
- The SFC scan will now start. The scan can take up to 15 minutes, so don’t interrupt it.
According to users, sometimes Windows Defender service won’t start because of file corruption. Your system files can get corrupted, and that can cause this error to appear.
Once the scan is finished, check if the problem persists. If the issue is still present, or if you couldn’t run an SFC scan, you might want to try running a DISM scan instead.
3.2 DISM scan
- Press Windows Key + X and select Command Prompt (Admin) or Powershell (Admin).
- When Command Prompt opens, enter the following command and hit Enter:
DISM /Online /Cleanup-Image /RestoreHealth
- DISM scan will now start. The scan can take up to 20 minutes, sometimes more, so you need to be patient and not interrupt it.
Once the DISM scan is finished, check if the problem persists. If the problem is still there or you couldn’t run the DISM scan before, repeat the SFC scan and check if that solves the problem.
4. Clean your registry
Sometimes, Windows Defender cannot be started if there are issues with your registry. For example, a corrupted registry entry can cause this issue to appear, and you need to find and remove the problematic access.
This is a complex task to perform manually, so it’s better to use special software. There are many great registry cleaners available that can help you with that problem.
To find the proper choice for this task, you can opt for efficient registry cleaner tools that eliminate residual files and optimize your PC.
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5. Create a new user account
- Open the Settings app and go to the Accounts section.
- Go to Family & other people on the menu on the left. Then, click Add someone else to this PC in the right pane.
- Click I don’t have this person’s sign-in information.
- Now select Add a user without a Microsoft account.
- Enter the desired user name and click Next.
After creating a new user account, switch to it and check if the problem is still present. If not, you might have to change to the newly created account and start using it instead of your old one.
6. Perform an in-place upgrade
- Download Media Creation Tool from Microsoft’s website and run it.
- Select Upgrade this PC now, and click Next.
- Wait while setup prepares the necessary files.
- Select Download and install updates, driver, and optional features (recommended), then click the Next button.
- Follow the instructions on the screen until you reach the Ready to install screen.
- Make sure that Keep personal files and apps appears on the recap list. If not, click Change what to keep and select Keep personal files and apps from the list.
- Follow the instructions on the screen to complete the installation.
Once the installation is finished, you’ll have a fresh installation of Windows, and the problem should be resolved.
Not being able to start the Windows Defender service can be a problem, but we hope you managed to fix this issue with one of our solutions.
You might be also interested in our guide on what is MsSense.exe and how to fix its errors because it’s the executable of Microsoft Defender for Endpoint.
Before you leave, you can also check our guide on what to do if you can’t access the Windows Defender Scans folder.
Note that we have not made these solutions in any particular order, so you should try what seems the most appropriate.
Madalina Dinita
Networking & Security Specialist
Madalina has been a Windows fan ever since she got her hands on her first Windows XP computer.
She is interested in all things technology, especially emerging technologies — AI and DNA computing in particular.
Prior to joining the WindowsReport team, she worked in the corporate world for a number of years.
На одном из компьютеров в настройках встроенного антивируса Windows Defender (Защитник Windows) пропала вкладка «Защита от вирусов и угроз», а при попытке открыть окно с настройками появилось сообщение:
Страница недоступна. Ваш системный администратор ограничил доступ к некоторым областям этого приложения, в том числе к элементу, к которому вы пытаетесь получить доступ. Чтобы узнать больше, свяжитесь со службой технической поддержки вашего ИТ-отдела.
Page not available. Your IT administrator has limited access to some areas of this app, and the item you tried to access is not available. Contact IT helpdesk for more information.
В моем случае в приложении Windows Security отсутствовала вкладка Virus and Threat Protection. Эта проблема встречается в версиях Windows 10 и 11 начиная с билда 22H2.
Это может произойти:
- Если на компьютере установлен сторонний сертифицированный антивирус. В этом случае некоторые функции панели управления Security отключаются;
- Параметры защитника Windows заданы администратором через групповые политики (выполните команду
rsop.msc
или
GPResult /h GPResult.html & GPResult.html
чтобы посмотреть примененные настройки GPO); - Включена блокировка графического интерфейса Защитника Windows
Чтобы проверить включена ли блокировка Windows Defender UI, выполните команду:
Get-MpPreference|select UILockdown
Чтобы разблокировать UI защитника выполните команду:
Set-MpPreference -UILockdown $false
После этого вкладка Virus and Thread у меня отобразилась в интерфейсе Windows Security.
Также можно заблокировать/разблокировать UI в Windows Defender через реестр. Если команда выше не помогла, проверьте следующее:
- Откройте
regedit.exe
; - Перейдите в HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\
- Проверьте, что во вложенных ветках отсутствует параметра реестра UILockdown со значением 1;
- Если этот параметр присутствует, удалите его;
- Аналогично проверьте ветку HKLM\SOFTWARE\Policies\Microsoft\Windows Defender Security Center\Virus and threat protection и удалите параметр UILockdown, если имеется.
Этот параметр реестра может включаться политикой Hide the Virus and threat protection area in Windows Security в разделе редактора GPO (
gpedit.msc
) Computer Configuration -> Administrative Templates -> Windows Components -> Windows Security -> Virus and Thread Protection. Проверьте, что этот парамтер GPO не настроен или отключен.
Если эта команда не помогла, попробуйте сбросить настройки приложения Безопасность Windows:
Get-AppxPackage Microsoft.SecHealthUI -AllUsers | Reset-AppxPackage
Если ни один из способов не помог попробуйте сбросить настройки Windows Defender в реестре, сбросить настройки локальной GPO, и перезагрузить компьютер:
reg delete "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender" /v
reg delete "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender Security Center" /v
RMDIR /S /Q "%WinDir%\System32\GroupPolicyUsers"
RMDIR /S /Q "%WinDir%\System32\GroupPolicy"
This article covers the steps to enable Windows Defender GUI on Windows Server. You can turn on Defender GUI using PowerShell or via the Add Roles and Features Wizard in Windows Server.
By default, Microsoft Defender Antivirus is installed and functional on Windows Server. Sometimes, the user interface (Defender GUI) is installed by default. Many organizations prefer to use the GUI for Microsoft Defender Antivirus.
Windows Defender is a reputable antivirus program included with Windows 10 and Windows 11. Windows Defender Antivirus protects email, apps, the cloud, and the web in real time from software threats like viruses, malware, and spyware.
Microsoft Defender Antivirus is available in the following editions/versions of Windows Server:
- Windows Server 2022
- Windows Server 2019
- Windows Server, version 1803 or later
- Windows Server 2016
- Windows Server 2012 R2 (Requires Microsoft Defender for Endpoint)
Take a look at the upgrade paths for all the Windows Server versions.
Ways to Turn on the GUI for Windows Defender
There are three ways to turn on the defender GUI:
- PowerShell
- Using the Windows Server – Add Roles or Features
- Using Group Policy
Most of the new Windows Server operating systems come with Windows Defender already installed and working. However, a feature of Windows Defender, the GUI, isn’t set up. You can enable it using any of the methods described above.
When is the GUI for Windows Defender enabled by default? The Defender GUI feature is by default enabled when installing the Server OS from an updated ISO copy obtained from MSDN or VLSC. But if you don’t see that feature enabled, you can use the methods described in this post to activate it. Remember that disabling the Windows Defender core feature prevents you from enabling the interface.
Enable Windows Defender GUI on Windows Server
Perform the following steps to turn on the Defender GUI using the Add Roles and Features Wizard:
- Launch the Server Manager.
- Click on Tools > Manage.
- Click Add Roles and Features.
- When you get to the Features step of the wizard, under Windows Defender Features, select the GUI for Windows Defender option.
The Add Roles and Features Wizard will now appear. For Installation Type, select the option “Role-based or feature-based installation” and click Next.
Click Next on the Server Selection and Server Roles page. On the Features page, from the list of features, look for “Windows Defender Features“, and enable the option “GUI for Windows Defender.” Click Next.
Note: In case you don’t find the Windows Defender features in the list of server features, it means that the Windows Defender core feature has been disabled on the server.
On the confirmation page, click “Install.” In the below example, the option “Restart the destination server automatically if required” is enabled. In the event that a role or feature requires a restart during its installation or uninstallation, the reboot will occur automatically with this option enabled.
We see that the GUI for the Windows Defender feature is enabled successfully on the server. Click Close. You may choose to reboot the server if there is a pending restart. You should now be able to access the Defender GUI after starting the Windows Defender tool.
Use PowerShell to Turn on Windows Defender GUI on Server
You can use PowerShell to turn on Windows Defender GUI on Windows Server operating systems. Using the PowerShell command is probably much easier and quicker than the previous method. You can also hide Windows Defender’s user interface (GUI) or uninstall it with a PowerShell command.
To turn on the Defender GUI on Windows Server, run the PowerShell as administrator. Run the below command to enable the Windows Defender interface.
Install-WindowsFeature -Name Windows-Defender-GUI
To hide the Windows Defender GUI, type the below command. Note that Windows Defender AV will still run normally without the user interface.
Uninstall-WindowsFeature -Name Windows-Defender-GUI
Still Need Help?
If you need further assistance on the above article or want to discuss other technical issues, check out some of these options.