
Windows Defender Troubleshooting Checklist
Windows Defender (now Microsoft Defender Antivirus) usually runs quietly in the background, but s...

Windows Defender (now Microsoft Defender Antivirus) usually runs quietly in the background, but s...

You try to send or receive email in Outlook and see an error: "Proxy authentication failed"

If Chrome is using 90%–100% of your CPU even with just a few tabs open, the problem is often the ...

If you see an error that the Windows Activation Service is not running or disabled, it usually me...

When you try to unlock a BitLocker-encrypted drive and see error 504, the drive remains locked an...

When you see Windows Defender error 0x80070422, it usually means the Windows Defender service isn...