After activating windows , windows security doesn t work anymore (windows 11)

[ArmanDurakoglu]

After I activated my windows 11 I realised after a few days the windows security doesn't open up anymore, what should I do I've already done all the fixes on the internet and it isn't working.

[JonnyTech]

Reinstall the Windows Security / Microsoft Defender app from Microsoft Store.

[ave9858]

MAS doesn't touch Windows Defender or the Windows Security app, and it also doesn't remain running in the background after the HWID activation so your issue couldn't have been caused by MAS.

[WindowsAddict]

@ArmanDurakoglu That is a Windows 11 bug, nothing to do with MAS or activation. It looks like its happening when people are using reset PC option. Either wait for the MS to fix it or do clean install of Windows.

[cveete]

Agree with you, this is Windows 11 bug, nothing related with MAS or activation. It will happen when using reset PC option.
I reset 2 laptop using reset option, after reset, the window security doesn't working anymore for both of laptop.
I try to get help from Microsoft support team, they also can't solved direct for me and told me to waiting for the new update to fix this problem

[JonnyTech]

Indeed, I should have mentioned that it is a Windows bug, nothing at all related to MAS, and the fix works.

[XSpark0]

Go to Settings > Apps > Installed apps > System Components > Windows Security > Advanced options.
Click Repair or Reset button to try and fix it.

[WindowsAddict]

@ArmanDurakoglu
try this tool https://answers.microsoft.com/en-us/windows/forum/windows_11-security/windows-security-stuck-on-black-screen-after/347ae039-5439-405d-83e1-fbfabbe23712?messageId=bcf515db-f366-459c-bda7-9b8498981e6f
let me know the results.