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...
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When the Microsoft Store won't open, shows error codes, or fails to download apps, it's usually d...
Fix 'Windows Defender Command Not Found' in Windows 10
You open Command Prompt or PowerShell, type something like MpCmdRun or Get-MpC...
How to Fix Windows Defender Proxy Error
If you see a proxy error in Windows Defender—often something like "Your IT administrator has limi...