
Windows Security App Missing in Windows 11: How to Restore It
If you open Start and type 'Windows Security' but nothing appears, or you get an error when tryin...
Software troubleshooting desk

If you open Start and type 'Windows Security' but nothing appears, or you get an error when tryin...

If your Command Prompt (cmd.exe) takes several seconds to appear or feels sluggish when typing co...

You right-click Command Prompt and select 'Run as administrator', but nothing happens, or it open...

You see a message that Windows Defender definitions are out of sync, or that the client and serve...

You see an error like 'Windows Update version mismatch' or 'The update is not applicable to your ...

If you see an error saying the Windows Activation service is not running, your system may not be ...