
Windows Security Troubleshooting Checklist
If Windows security features aren't working as expected—like Windows Defender won't start, update...
Software troubleshooting desk

If Windows security features aren't working as expected—like Windows Defender won't start, update...

When you see an error like powershell is not recognized as an internal or external command<...

You try to enable or update Windows Defender, but get an error about a version mismatch. This typ...

You try to open Outlook and get the message: "The Outlook data file cannot be opened." This usual...

You see error 0x803f7001 when trying to activate Windows. The message mentions a “rate limit.” Th...

You try to move, rename, or delete a file, but Windows tells you it's locked by Chrome. This usua...