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

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

You open Microsoft Teams, try to sign in, and get an 'Authentication failed' error. This usually ...

You open Windows Security and see an error about a dependency conflict—maybe a service failed to ...

If you're seeing a 504 Gateway Timeout error when Chrome tries to load your profile or sync data,...

You open Microsoft Store and see a connection timeout error with code 0x80131500. This usually me...

You open Firefox after a profile switch or reinstall and your bookmarks, passwords, or open tabs ...