
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...

When you type into the Start menu or File Explorer search box and get no results, it's usually a ...

When you see 'authentication failed' in Command Prompt, it usually means the system couldn't veri...

If you frequently use PowerShell and want it to open by default instead of Command Prompt, Window...

If Windows Defender crashes or fails to start after a recent update and you see error 0x800704ec,...

After a Windows update, you might see a 'module not found' error when running commands in Command...