How to Fix Windows Security Error 0x80073b01
You may see error 0x80073b01 when opening Windows Security or trying to use its features. It usua...
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View listFix Windows Update Authentication Failed / Permission Denied
When Windows Update fails with an "authentication failed" or "permission denied" message, it usua...
Fix Windows Defender Update Error 0x80070643
You try to update Windows Defender and see error 0x80070643. This usually means a Windows Update ...
Fix Windows Search Service Not Running Error
If you click the Start menu or search bar and nothing happens, or you see a message that Windows ...
Fix Windows Defender Authentication Error from Corrupted System Files
You open Windows Defender and see an authentication failed error. This often happens after a fail...
Windows Defender Stuck Loading: Reinstall Steps
Windows Defender (now Microsoft Defender) sometimes hangs on a loading screen, especially after a...
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