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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.

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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.

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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.

1. Get Advanced Run from Nirsoft and unzip it somewhere on your computer.

   https://www.nirsoft.net/utils/advanced_run.html

2. Open the folder and double-click on the “AdvancedRun.exe” file.
3. Hit the “Browse” button and find the Registry Editor executable file (regedit.exe) or type in the path: “C:\Windows\regedit.exe“.
4. In the “Run As” section, pick “TrustedInstaller” from the list.
5. Press the “Run” button to open regedit.exe as TrustedInstaller.
   

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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.

1. Download our restore Windows Defender service registry fix.
2. Unzip the file (better to do it on the C: drive).
   

   Картинка с сайта: www.windowsdigitals.com

3. In the Registry Editor, click File and choose Import.
   

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4. Find the registry file for your version of Windows. If you’re on Windows 11, pick the RestoreWindowsDefender-Windows11.reg file.
   

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5. Click Yes when asked for confirmation.
6. 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.

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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.

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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.

Выделите следующий текст:

Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\wscsvc] «DisplayName»=»@%SystemRoot%\\System32\\wscsvc.dll,-200″»ErrorControl»=dword:00000001″ImagePath»=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,00,\74,00,25,00,5c,00,53,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,73,\ 00,76,00,63,00,68,00,6f,00,73,00,74,00,2e,00,65,00,78,00,65,00,20,00,2d,00,\ 6b,00,20,00,4c,00,6f,00,63,00,61,00,6c,00,53,00,65,00,72,00,76,00,69,00,63,\ 00,65,00,4e,00,65,00,74,00,77,00,6f,00,72,00,6b,00,52,00,65,00,73,00,74,00,\ 72,00,69,00,63,00,74,00,65,00,64,00,00,00 «Start»=dword:00000002 «Type»=dword:00000020 «Description»=»@%SystemRoot%\\System32\\wscsvc.dll,-201» «DependOnService»=hex(7):52,00,70,00,63,00,53,00,73,00,00,00,57,00,69,00,6e,00,\ 4d,00,67,00,6d,00,74,00,00,00,00,00 «ObjectName»=»NT AUTHORITY\\LocalService» «ServiceSidType»=dword:00000001 «RequiredPrivileges»=hex(7):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,\67,00,65,00,00,00,53,00,65,00,49,00,6d,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,\ 00,00,00,00 «DelayedAutoStart»=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,c0,d4,01,00,01,00,00,00,e0,93,04,00,00,00,00,00,00,00,00,00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\wscsvc\Parameters] «ServiceDllUnloadOnStop»=dword:00000001 «ServiceDll»=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,\ 00,74,00,25,00,5c,00,53,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,\ 77,00,73,00,63,00,73,00,76,00,63,00,2e,00,64,00,6c,00,6c,00,00,00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\wscsvc\Security] «Security»=hex:01,00,14,80,c8,00,00,00,d4,00,00,00,14,00,00,00,30,00,00,00,02,\ 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,\ 00,00,02,00,98,00,06,00,00,00,00,00,14,00,fd,01,02,00,01,01,00,00,00,00,00,\ 05,12,00,00,00,00,00,18,00,ff,01,0f,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,\ 00,14,00,8d,01,02,00,01,01,00,00,00,00,00,05,06,00,00,00,00,00,14,00,00,01,\ 00,00,01,01,00,00,00,00,00,05,0b,00,00,00,00,00,28,00,15,00,00,00,01,06,00,\ 00,00,00,00,05,50,00,00,00,49,59,9d,77,91,56,e5,55,dc,f4,e2,0e,a7,8b,eb,ca,\ 7b,42,13,56,01,01,00,00,00,00,00,05,12,00,00,00,01,01,00,00,00,00,00,05,12,\ 00,00,00

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When you install Windows 11, Windows Security or Windows Defender becomes the default antivirus and security solution. It is one of the most excellent remedies available, and it is effective in most circumstances.

Nevertheless, one of the most frequently encountered concerns has been that the Windows 11 Windows Security is not opening or functioning as expected after an upgrade or random upgrade.

Why is my Windows Security not opening on Windows 11?

The reasons Windows Security settings are not opening or launching on Windows 11 after upgrading are close to close. Below are the popular reasons:

• Glitches with the app: One of the reasons Windows security is not loading on Windows 11 is some glitches preventing it from opening. The solution here is to reset the app.
• Faulty system files: If the system files meant to load the Windows Security apps are faulty, the app won’t open. You need to repair the system files to fix this.

How can I fix the Windows 11 Windows Security not opening issue?

1. Reset using PowerShell Command

1. Right-click on the Start icon and select the Windows Terminal (Admin) option.
   

   Картинка с сайта: windowsreport.com

2. Click the dropdown at the top and select the Windows PowerShell option.
   

   Картинка с сайта: windowsreport.com

3. Copy and paste the command below and hit Enter: Get-AppxPackage Microsoft.SecHealthUI -AllUsers | Reset-AppxPackage
   

   Картинка с сайта: windowsreport.com

4. Restart your PC and check if the Windows Security app is now working.
5. If it does not work, type the command below and hit Enter to reinstall the app: Set-ExecutionPolicy Unrestricted Get-AppXPackage -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}
   

   Картинка с сайта: windowsreport.com

You need to reset the app if Windows Security is not working or Windows Defender is not opening. The command below has worked for many. You can reinstall the app using the second command if resetting does not work.

2. Repair the app

1. Press the Windows key + I to open the Settings app, choose Apps in the left pane, followed by Apps & features.
   

   Картинка с сайта: windowsreport.com

2. Once you are inside the Apps & features window, search for Windows Security in the search bar from the top, and click on the three-dot menu next to it, followed by Advanced options.
   

   Картинка с сайта: windowsreport.com

3. Scroll down until you find the Reset section, then click on the Repair button to start the repairing process.
   

   Картинка с сайта: windowsreport.com

Allow the Repair process to finish before rebooting your computer to guarantee your changes are applied. Then, by starting Windows Security, it lets you see if its functionality has been restored.

3. Reset the app

1. Press the Windows key + I, go to Apps in the left pane, followed by Apps & features.
   

   Картинка с сайта: windowsreport.com

2. Once inside the Apps & features window, search for Windows Security in the search bar, and click on the three-dot menu. Now click on Advanced options.
   

   Картинка с сайта: windowsreport.com

3. Scroll down until you meet the Reset section, then click on the Reset button.
   

   Картинка с сайта: windowsreport.com

4. Run SFC

1. Press the Windows + S key to open the Search bar, then type cmd, right-click on the most relevant result shown to you, and run it as an Administrator to get full privileges.
   

   Картинка с сайта: windowsreport.com

2. Type in the following command and press Enter to start the process:
   sfc /scannow
   

   Картинка с сайта: windowsreport.com

The process may take some time to finish, so you may need to restart your computer. SFC will automatically find and restore corrupted files and folders. If that does not help, you can try using specialized repair tools, which are much more advanced than Windows built-in tools.

5. Run DISM

1. Press the Windows + S key to open the Search bar, then type cmd, and right-click on the most relevant result to run it as an Administrator.
   

   Картинка с сайта: windowsreport.com

2. Paste or type in the following commands and press Enter after each: DISM /online /Cleanup-Image /ScanHealth DISM /Online /Cleanup-Image /RestoreHealth
   

   Картинка с сайта: windowsreport.com

Continue to be patient until the process is finished. Be advised that the process could take up to ten minutes to finish. Once you’ve completed this step, restart your computer to ensure the changes take effect.

6. Disable your antivirus

1. Click the expand arrow from your taskbar and right-click on your antivirus icon. Now choose Avast shields control followed by Disable for 10 minutes to stop it from interfering.
   

   Картинка с сайта: windowsreport.com

2. If you have other antivirus programs installed, you can temporarily disable the app following the same steps as above or similar ones with a few differences.
   

   Картинка с сайта: windowsreport.com

With the fixes above, you should be able to fix the Windows Security not opening on Windows 11 issue. If you want to use a third-party tool, check out our post on five of the best antiviruses for Windows 11.

Alternatively, you can look at our article on the best antiviruses with low CPU usage for Windows 11.

If you want to know how to turn on Dev Device protection on your Windows 11 computer, we have a detailed guide to help you with that.

In case you have more issues, don’t miss our guide on how to reinstall Windows Security on Windows 11 for more solutions.

Let us know in the comments section below which solution worked best for you in solving the Windows 11 Windows Defender not working issue and which antivirus software you prefer.

Loredana is a passionate writer with a keen interest in PC software and technology. She started off writing about mobile phones back when Samsung Galaxy S II was on top of the world and she fell in love with tech of all sorts.

Whenever she’s not at her work desk, you’ll find her enjoying refreshing tea flavors, spilling stories on paper, and listening to the radio.