Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SecurityHealthService]
"DependOnService"=hex(7):52,00,70,00,63,00,53,00,73,00,00,00,00,00
"Description"="@%systemroot%\\system32\\SecurityHealthAgent.dll,-1001"
"DisplayName"="@%systemroot%\\system32\\SecurityHealthAgent.dll,-1002"
"ErrorControl"=dword:00000001
"FailureActions"=hex:80,51,01,00,00,00,00,00,00,00,00,00,03,00,00,00,14,00,00,\
00,01,00,00,00,60,ea,00,00,01,00,00,00,60,ea,00,00,00,00,00,00,00,00,00,00
"ImagePath"=hex(2):22,00,25,00,50,00,72,00,6f,00,67,00,72,00,61,00,6d,00,46,00,69,00,\
6c,00,65,00,73,00,25,00,5c,00,57,00,69,00,6e,00,64,00,6f,00,77,00,73,00,20,\
00,44,00,65,00,66,00,65,00,6e,00,64,00,65,00,72,00,5c,00,4d,00,73,00,4d,00,\
70,00,45,00,6e,00,67,00,2e,00,65,00,78,00,65,00,22,00,00,00
"LaunchProtected"=dword:00000002
"ObjectName"="LocalSystem"
"RequiredPrivileges"=hex(7):53,00,65,00,49,00,6d,00,70,00,65,00,72,00,73,00,6f,\
00,6e,00,61,00,74,00,65,00,50,00,72,00,69,00,76,00,69,00,6c,00,65,00,67,00,\
65,00,00,00,53,00,65,00,42,00,61,00,63,00,6b,00,75,00,70,00,50,00,72,00,69,\
00,76,00,69,00,6c,00,65,00,67,00,65,00,00,00,53,00,65,00,52,00,65,00,73,00,\
74,00,6f,00,72,00,65,00,50,00,72,00,69,00,76,00,69,00,6c,00,65,00,67,00,65,\
00,00,00,53,00,65,00,44,00,65,00,62,00,75,00,67,00,50,00,72,00,69,00,76,00,\
69,00,6c,00,65,00,67,00,65,00,00,00,53,00,65,00,43,00,68,00,61,00,6e,00,67,\
00,65,00,4e,00,6f,00,74,00,69,00,66,00,79,00,50,00,72,00,69,00,76,00,69,00,\
6c,00,65,00,67,00,65,00,00,00,53,00,65,00,53,00,65,00,63,00,75,00,72,00,69,\
00,74,00,79,00,50,00,72,00,69,00,76,00,69,00,6c,00,65,00,67,00,65,00,00,00,\
53,00,65,00,41,00,73,00,73,00,69,00,67,00,6e,00,50,00,72,00,69,00,6d,00,61,\
00,72,00,79,00,54,00,6f,00,6b,00,65,00,6e,00,50,00,72,00,69,00,76,00,69,00,\
6c,00,65,00,67,00,65,00,00,00,53,00,65,00,54,00,63,00,62,00,50,00,72,00,69,\
00,76,00,69,00,6c,00,65,00,67,00,65,00,00,00,53,00,65,00,53,00,79,00,73,00,\
74,00,65,00,6d,00,45,00,6e,00,76,00,69,00,72,00,6f,00,6e,00,6d,00,65,00,6e,\
00,74,00,50,00,72,00,69,00,76,00,69,00,6c,00,65,00,67,00,65,00,00,00,53,00,\
65,00,53,00,68,00,75,00,74,00,64,00,6f,00,77,00,6e,00,50,00,72,00,69,00,76,\
00,69,00,6c,00,65,00,67,00,65,00,00,00,00,00
"ServiceSidType"=dword:00000001
"Start"=dword:00000003
"Type"=dword:00000010
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SecurityHealthService\Security]
"Security"=hex:01,00,14,80,1c,01,00,00,28,01,00,00,14,00,00,00,30,00,00,00,02,\
00,1c,00,01,00,00,00,02,80,14,00,ff,00,0f,00,01,01,00,00,00,00,00,01,00,00,\
00,00,02,00,ec,00,08,00,00,00,00,00,18,00,9d,00,02,00,01,02,00,00,00,00,00,\
05,20,00,00,00,21,02,00,00,00,00,14,00,9d,01,02,00,01,01,00,00,00,00,00,05,\
12,00,00,00,00,00,18,00,9d,01,02,00,01,02,00,00,00,00,00,05,20,00,00,00,20,\
02,00,00,00,00,14,00,9d,00,02,00,01,01,00,00,00,00,00,05,04,00,00,00,00,00,\
14,00,9d,00,02,00,01,01,00,00,00,00,00,05,06,00,00,00,00,00,28,00,fd,01,02,\
00,01,06,00,00,00,00,00,05,50,00,00,00,e5,fe,79,5f,a0,ae,0d,3b,22,fa,0a,c9,\
01,5a,41,3a,e5,a6,4a,b7,00,00,28,00,ff,01,0f,00,01,06,00,00,00,00,00,05,50,\
00,00,00,b5,89,fb,38,19,84,c2,cb,5c,6c,23,6d,57,00,77,6e,c0,02,64,87,00,00,\
28,00,ff,01,0f,00,01,06,00,00,00,00,00,05,50,00,00,00,db,8c,74,0f,c2,72,73,\
f3,2b,26,b9,44,77,1e,4f,02,76,63,b5,21,01,01,00,00,00,00,00,05,12,00,00,00,\
01,01,00,00,00,00,00,05,12,00,00,00
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WinDefend]
"DependOnService"=hex(7):52,00,70,00,63,00,53,00,73,00,00,00,00,00
"Description"="@%ProgramFiles%\\Windows Defender\\MpAsDesc.dll,-240"
"DisplayName"="Microsoft Defender Antivirus Service"
"ErrorControl"=dword:00000001
"FailureActions"=hex:80,51,01,00,00,00,00,00,01,00,00,00,03,00,00,00,14,00,00,\
00,01,00,00,00,e8,03,00,00,01,00,00,00,10,27,00,00,01,00,00,00,60,ea,00,00
"ImagePath"=hex(2):22,00,43,00,3a,00,5c,00,50,00,72,00,6f,00,67,00,72,00,61,00,\
6d,00,44,00,61,00,74,00,61,00,5c,00,4d,00,69,00,63,00,72,00,6f,00,73,00,6f,\
00,66,00,74,00,5c,00,57,00,69,00,6e,00,64,00,6f,00,77,00,73,00,20,00,44,00,\
65,00,66,00,65,00,6e,00,64,00,65,00,72,00,5c,00,50,00,6c,00,61,00,74,00,66,\
00,6f,00,72,00,6d,00,5c,00,34,00,2e,00,31,00,38,00,2e,00,32,00,32,00,30,00,\
35,00,2e,00,37,00,2d,00,30,00,5c,00,4d,00,73,00,4d,00,70,00,45,00,6e,00,67,\
00,2e,00,65,00,78,00,65,00,22,00,00,00
"LaunchProtected"=dword:00000003
"ObjectName"="LocalSystem"
"RequiredPrivileges"=hex(7):53,00,65,00,49,00,6d,00,70,00,65,00,72,00,73,00,6f,\
00,6e,00,61,00,74,00,65,00,50,00,72,00,69,00,76,00,69,00,6c,00,65,00,67,00,\
65,00,00,00,53,00,65,00,42,00,61,00,63,00,6b,00,75,00,70,00,50,00,72,00,69,\
00,76,00,69,00,6c,00,65,00,67,00,65,00,00,00,53,00,65,00,52,00,65,00,73,00,\
74,00,6f,00,72,00,65,00,50,00,72,00,69,00,76,00,69,00,6c,00,65,00,67,00,65,\
00,00,00,53,00,65,00,44,00,65,00,62,00,75,00,67,00,50,00,72,00,69,00,76,00,\
69,00,6c,00,65,00,67,00,65,00,00,00,53,00,65,00,43,00,68,00,61,00,6e,00,67,\
00,65,00,4e,00,6f,00,74,00,69,00,66,00,79,00,50,00,72,00,69,00,76,00,69,00,\
6c,00,65,00,67,00,65,00,00,00,53,00,65,00,4c,00,6f,00,61,00,64,00,44,00,72,\
00,69,00,76,00,65,00,72,00,50,00,72,00,69,00,76,00,69,00,6c,00,65,00,67,00,\
65,00,00,00,53,00,65,00,53,00,65,00,63,00,75,00,72,00,69,00,74,00,79,00,50,\
00,72,00,69,00,76,00,69,00,6c,00,65,00,67,00,65,00,00,00,53,00,65,00,53,00,\
68,00,75,00,74,00,64,00,6f,00,77,00,6e,00,50,00,72,00,69,00,76,00,69,00,6c,\
00,65,00,67,00,65,00,00,00,53,00,65,00,49,00,6e,00,63,00,72,00,65,00,61,00,\
73,00,65,00,51,00,75,00,6f,00,74,00,61,00,50,00,72,00,69,00,76,00,69,00,6c,\
00,65,00,67,00,65,00,00,00,53,00,65,00,41,00,73,00,73,00,69,00,67,00,6e,00,\
50,00,72,00,69,00,6d,00,61,00,72,00,79,00,54,00,6f,00,6b,00,65,00,6e,00,50,\
00,72,00,69,00,76,00,69,00,6c,00,65,00,67,00,65,00,00,00,53,00,65,00,54,00,\
63,00,62,00,50,00,72,00,69,00,76,00,69,00,6c,00,65,00,67,00,65,00,00,00,53,\
00,65,00,49,00,6e,00,63,00,72,00,65,00,61,00,73,00,65,00,42,00,61,00,73,00,\
65,00,50,00,72,00,69,00,6f,00,72,00,69,00,74,00,79,00,50,00,72,00,69,00,76,\
00,69,00,6c,00,65,00,67,00,65,00,00,00,53,00,65,00,53,00,79,00,73,00,74,00,\
65,00,6d,00,45,00,6e,00,76,00,69,00,72,00,6f,00,6e,00,6d,00,65,00,6e,00,74,\
00,50,00,72,00,69,00,76,00,69,00,6c,00,65,00,67,00,65,00,00,00,53,00,65,00,\
54,00,61,00,6b,00,65,00,4f,00,77,00,6e,00,65,00,72,00,73,00,68,00,69,00,70,\
00,50,00,72,00,69,00,76,00,69,00,6c,00,65,00,67,00,65,00,00,00,00,00
"ServiceSidType"=dword:00000001
"Start"=dword:00000003
"Type"=dword:00000010
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WinDefend\Security]
"Security"=hex:01,00,14,80,cc,00,00,00,d8,00,00,00,14,00,00,00,30,00,00,00,02,\
00,1c,00,01,00,00,00,02,80,14,00,ff,01,0f,00,01,01,00,00,00,00,00,01,00,00,\
00,00,02,00,9c,00,06,00,00,00,00,00,18,00,9d,01,02,00,01,02,00,00,00,00,00,\
05,20,00,00,00,21,02,00,00,00,00,14,00,9d,01,02,00,01,01,00,00,00,00,00,05,\
12,00,00,00,00,00,18,00,9d,01,02,00,01,02,00,00,00,00,00,05,20,00,00,00,20,\
02,00,00,00,00,14,00,9d,01,02,00,01,01,00,00,00,00,00,05,04,00,00,00,00,00,\
14,00,9d,01,02,00,01,01,00,00,00,00,00,05,06,00,00,00,00,00,28,00,ff,01,0f,\
00,01,06,00,00,00,00,00,05,50,00,00,00,bf,55,08,72,3b,e0,28,d0,89,79,4b,f8,\
91,89,6e,7c,40,25,ec,f4,01,01,00,00,00,00,00,05,12,00,00,00,01,01,00,00,00,\
00,00,05,12,00,00,00
;Remove Defender Policies
[-HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender]
[-HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Advanced Threat Protection]
[-HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender Security Center]
If you can’t open Windows Defender or access any of its settings, or if you have accidentally uninstalled Windows Defender, this guide will show you how to reinstall Windows Defender in Windows 11 via PowerShell command lines.
Although Windows Defender has always been the default antivirus software that comes preinstalled with Windows, some users may find the app missing after certain events such as after updating Windows or after installing or uninstalling certain third party antivirus software.
When the problem occurs and you try to open Windows Defender, Windows may prompt you the “You’ll need a new app to open this Windows Defender link” pop up that ask you to find a compatible app from Microsoft Store to open Windows Defender related link or setting. This indicates that Windows Defender is either missing or corrupted in Windows 11.
Reinstall Windows Defender in Windows 11
You can reinstall Microsoft Windows Defender in Windows 11 by executing a single line of command through PowerShell or Windows Terminal. However, you will need administrator rights to be able to execute the command.
Thus, you will need to first open Windows Terminal or PowerShell with admin rights. To do so, right-click the Start button on the taskbar and select “Windows Terminal (Admin)“.
Alternatively, you can search for PowerShell through Start menu. Then, right-click Windows PowerShell from the search result and select Run as administrator.
Once you have an elevated (admin) Windows Terminal or PowerShell window opened, enter the following command to reset and reinstall Windows Defender in Windows 11.
Get-AppxPackage Microsoft.SecHealthUI -AllUsers | Reset-AppxPackage
After executing the command, Windows Terminal will begin to reset Windows Defender and show a progress message that says “Deployment operation progress”. It may take a while for the process to complete.
Once completed, the progress message will disappear and Windows Terminal will start at a new line, which indicates the previous command has been executed.
Now, you can press Win + i keys to open Settings and go to Privacy & security > Windows Security. This should open up the Windows Security (Windows Defender) settings like it used to.
To further verify if Windows Defender is successfully installed, click on the “Open Windows Security” button to open the Windows Security window. From there, you can manage your computer’s security such as virus protection, firewall, network protection, browser control, etc.
PowerShell shows errors when executing the command
If the command above doesn’t work or if you receive errors when you execute the command, try the following commands instead to reinstall Windows Defender in Windows 11.
In an elevated (admin) Windows Terminal or PowerShell window, enter the following commands in the following order.
Set-ExecutionPolicy Unrestricted
Get-AppXPackage -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}
Set-ExecutionPolicy Default
Since the command requires execution policy to be set to unrestricted in order to be executed successfully, you should set the execution policy back to its default (by running the third line of command as shown above) after the Get-AppXPackage process is completed.
If you receive an error that says “Access is denied”, it indicates that you do not have the rights to run the command. As mentioned above, you need to open Windows Terminal or PowerShell as administrator in order to execute the command successfully.
How to enable Windows Defender if you already have an existing antivirus software
If you already have an existing third party antivirus program actively running and protecting your PC, Microsoft Defender Antivirus will be disabled. However, you can re-enable Microsoft Defender periodic scanning to have it periodically check for threats in conjunction with your other antivirus software.
To enable Windows Defender with periodic scanning when you are already using an existing third party antivirus software, open Settings and navigate to Privacy & Security > Windows Security, then click the Open Windows Security button.
Next, select Virus & threat protection and click Microsoft Defender Antivirus options. This will expand the setting and you should then be able to see a toggle option. Toggle on the Periodic scanning option to enable Windows Defender periodic scan while also using your other antivirus software.
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.
-
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
-
Not really. While Windows Defender provides basic protection from threats, it’s no substitute for third-party antivirus software.
-
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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Windows Defender missing on Windows 11 is one of the numerous problems users face when using Microsoft’s default antivirus on their PC.
In the past, users have complained that Windows 11 Defender is turned off. But some could not even find the app on their PC at all.
Thankfully, the fixes for this problem are not far-fetched, with a little tweak needed in most cases. Read on to find out what to do if Windows Defender is not installed on your Windows 11 device.
Why can’t I find Windows Defender?
There are various reasons why Windows Defender is not found in Windows 11, but we will highlight the most important ones:
- Malware infection – Usually, the first thing a virus or malware does is disable or eliminate the antivirus. Good third-party antiviruses are harder to counter.
- The service is not running – Though Windows Defender should show up even when the service is not running, this, coupled with other issues, can make the app inaccessible.
- Registry problems – Changes to the registry, wherein Windows Defender is disabled, could be an underlying cause. The administrator could take action in case you are using an office computer.
So, let’s find out how to fix things if Windows Defender is not working in Windows 11.
Quick Tip:
If you want to protect your PC on all fronts, use a security utility with multi-layered protection. ESET HOME Security Essential’s feature set aims to protect you from today’s cyber threats.
It includes advanced banking and payment protection, webcam and microphone security, parental controls, anti-malware, anti-ransomware, and more.
ESET HOME Security Essential
ESET technology protects every click, screen tap, and step in your digital life.
How can I fix the Windows 11 Windows Defender missing issue?
1. Install Windows Defender Using PowerShell
-
1.Right-click on the Start icon in the Taskbar, and then select the Windows Terminal (Admin) option.
-
2.Click the Yes button to allow Windows Terminal to make changes to your PC.
-
3. Paste the following commands individually and hit Enter after each:
Set-ExecutionPolicy UnrestrictedGet-AppXPackage -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}
Using the commands below via Powershell should reinstall Windows Defender on your Windows 11 PC and solve the missing issue in no time.
The command above helps to reinstall all default Windows apps. This is especially useful if Windows Defender is not installed in Windows 11 due to file corruption during an upgrade.
2. Repair and reinstall Windows Defender
- Press Windows + S to open the Search menu, enter Terminal in the text field, right-click on the relevant search result, and select Run as administrator.
- Click Yes in the UAC prompt.
- Type/paste the following command and hit Enter:
Get-AppxPackage Microsoft.SecHealthUI-AllUsers | Reset-AppxPackage
Sometimes, Windows Defender might be installed, but the installation is either incorrect or incomplete. The command above will remove all components from the PC and reinstall Windows Defender in Windows 11.
To learn more, don’t miss our guide on how to reinstall Windows Security on Windows 11.
3. Perform a Windows update
- Press the Windows key, and select the Settings app.
- Select the Windows Update option on the left pane.
- Click the Check for updates button in the right pane.
- If an update is listed after the scan, download and installs it on the computer.
Windows update comes with fixes for bugs and other errors in the previous versions.
If Windows Security is missing in Windows 11, an update should have fixes for the bugs responsible for the error. Also, if it is due to an incomplete or incorrect update, this should solve the problem if done correctly.
4. Perform a System Restore
- Press Windows + R to launch the Run command, enter rstrui.exe in the text field, and click OK.
- Select Next in the System Restores window to proceed.
- Choose a restore point from the options provided, and click Next.
- Verify the restore details, and click on Finish to initiate the restore process.
If you noticed the Windows Defender link missing after installing an update in Windows 11 or making changes to the system, this fix could help you return to the previous state.
Select a restore point created before installing the new update, and things should return to normal.
- Recent Windows 11 update lets you disable profanity filter in voice typing
- Microsoft wants Windows 10 users to upgrade to Windows 11 or Copilot + PCs
- Windows 11 KB5055627 update makes File Explorer more fluid
- A few keyboard settings are moving from Control Panel to Settings app in Windows 11
- Details of Windows 11 25H2 spotted in the wild; likely to be a smaller update
Does Windows 11 have a built-in antivirus?
Yes, Windows 11 comes with Windows Security as the built-in antivirus. In case you are confused between the two, Windows Defender and Windows Security are the same thing.
The program efficiently identifies and eliminates malware and performs other essential functions to ensure security. But, in case you were looking for advanced security, we recommend using an effective third-party antivirus.
The Windows 11 Defender not installed problem is not the first faced by users. There have been complaints that Windows Defender is not opening or not enabled, among other issues.
Unlike some of these issues, this problem is not hard to fix, as shown above. We hope you find the helpful guide and get Windows Defender back to protect your PC.
Also, if you are wondering, Windows Defender can be downloaded from the Microsoft Store. This will download the Windows Defender 64-bit version in Windows 11.
Besides, find out what to do if you get the You’ll need a new app to open this windowsdefender link error in Windows 11.
Feel free to discuss the solution that worked for you in the comments section. You can also state any solution you tried successfully that is not in this guide.
Ola-Hassan Bolaji
Windows Hardware Expert
A Computer Engineering graduate, he has spent most of his life reading and writing about computers.
He finds joy in simplifying complex topics into simple solutions for PC users. The quality of his work and providing step-wise tested and proven solutions to PC issues are all that matter to him.
Away from computers, he is either reading or watching football!
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.