
Windows Defender Authentication Failed: Step-by-Step Checklist
You open Windows Security and see 'Authentication failed' when trying to use Windows Defender. Th...
Software troubleshooting desk

You open Windows Security and see 'Authentication failed' when trying to use Windows Defender. Th...

You try to connect to a remote desktop, but instead of a successful login, you get an error about...

If a Windows Store download has stalled—showing "Pending," "Paused," or stuck at 0%—you don't hav...

You open Search and nothing happens, or you see a message that indexing is paused. This often hap...

If you've booted into Safe Mode and noticed the CPU pegged at 100% due to a process related to Wi...

You open Windows Security and see 'Page not available' or 'Failed to load permissions'. This usua...