
How to Fix Windows Defender Authentication Failed Error
If you see "Authentication failed" when opening Windows Defender or trying to run a scan, it usua...
Software troubleshooting desk

If you see "Authentication failed" when opening Windows Defender or trying to run a scan, it usua...

You ran Disk Cleanup to clear Windows Update files, but it sits at 'Working on updates' for hours...

If Windows Defender isn't starting, showing errors, or acting strangely, the service settings may...

You open Chrome and see a warning about a version mismatch, or features stop working properly. Th...

After a PowerShell update, you might find that your custom profile (functions, aliases, prompt) n...

If you recently reinstalled Windows or performed a reset, you might see 'Access Denied' or 'Permi...