
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...

When migrating Windows security settings or using tools like the Security Configuration Wizard, y...

You type a filename into the Windows Search box, but nothing shows up—or only old results appear....

You open Windows Security and see a red banner: “Virus & threat protection turned off.” This can ...

When you see 'Authentication failed' in PowerShell while trying to connect to a remote server, it...

You open Outlook, and it hangs on the loading screen—sometimes showing “Loading profile” or just ...