
Enable Windows Security Manually When It Fails to Start
If Windows Security (formerly Windows Defender) fails to start, you may see an error like "This a...
Software troubleshooting desk

If Windows Security (formerly Windows Defender) fails to start, you may see an error like "This a...

After a Windows update, you might find that Command Prompt is missing from the Start menu, right-...

You sign in to Windows, but Windows Defender keeps asking for credentials in a loop. This guide c...

You're installing Windows 11, enter your product key, and get an error: 'The product key entered ...

You open Windows Defender and see an authentication failed error. This often happens after a fail...

You log into a network share or an app, but Windows keeps using an old security token. Permission...