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...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listWindows Activation Auto Start Troubleshooting Checklist
If Windows keeps prompting you to activate every time you start your PC, it's usually a sign that...
Fix Windows Update Cleanup Stuck Error 0x80070002
When running Disk Cleanup or the Windows Update troubleshooter, you might see error 0x80070002 an...
Fix PowerShell Backup Restore Error 0x80070005
When running a PowerShell script to restore a backup, you may encounter error code 0x80070005. Th...
Windows Security Backup Configuration Guide
If you've opened Windows Security and found that your virus and threat protection settings aren't...
How to Fix Microsoft Store Error 0x80072efd
When you see error 0x80072efd in Microsoft Store, it usually means the app can't reach its server...
Topic paths
Quick titles
How to Fix Windows Activation Edition MismatchMicrosoft Store Throttling Error TroubleshootingWindows Update Caused Blank Screen? Activation Fix GuideChrome Profile Missing After Reinstall FixFixing Microsoft Teams Camera Error 0x1fFix Outlook Cannot Start After UpdateMicrosoft Store Apps Stuck Updating After Windows Update?How to Troubleshoot BitLocker with Event Logs