
How to Reinstall Windows Defender in Windows 11
If Windows Defender (Microsoft Defender Antivirus) is missing, disabled, or not working correctly...
Software troubleshooting desk

If Windows Defender (Microsoft Defender Antivirus) is missing, disabled, or not working correctly...

You see a BitLocker error saying 'invalid configuration' when trying to enable or manage encrypti...

You try to activate Windows, but instead get an error message saying the activation configuration...

You try to delete, rename, or move a file, but Windows says it's locked by an unknown process. Th...

If your domain isn't resolving correctly after changing DNS records at Cloudflare, you're not alo...

When you open Microsoft Store on Windows 11 and see an error like "SSL certificate error" or "A p...