Fix 'Security Module Not Found' in Windows Defender
If you see a message in Windows Security that says something like "Security module not found" or ...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix Windows Activation Delay After Hardware Change
After changing your motherboard, CPU, or other major hardware, Windows may not activate immediate...
Fix Windows Activation Failed to Start Command Line Repair Tool
When Windows activation fails, you might see an error that the command line repair tool cannot st...
Fix Windows Update Error 0x80070020: Port Already Allocated
When you see error 0x80070020 during a Windows Update, it usually means a program is already usin...
Fix OneDrive Sync "File in Use" Error: Step-by-Step
You see a OneDrive sync error that says "file in use" or "the file is open in another program." T...
Fix Chrome Profile Login Loop After Password Change
You changed your Google account password, and now Chrome keeps asking you to sign in again—over a...
Topic paths
Quick titles
Windows Security Rate Limit Error: Troubleshooting ChecklistOneDrive Sync Module Missing After Reinstall: How to FixWindows Search Not Working With VPN Proxy FixRun Windows Activation as Admin: Step-by-StepNginx 502 Bad Gateway WordPress TroubleshootingHow to Fix Windows Permission Denied Error Code 5Troubleshoot Error Writing CMD Log File Permission DeniedFix 'File Locked by Another User' in Microsoft Teams