Windows Security Troubleshooting Guide
Windows Security (formerly Windows Defender) usually runs quietly in the background, but sometime...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix 'Putty Connection Refused' Error on Localhost
When you try to connect to localhost with Putty and get 'connection refused', it usually means th...
Fix Microsoft Store Connection Refused After Update
After a Windows update, some users see a 'connection refused' error when opening Microsoft Store....
Fix Windows Security Access Denied When Opening Settings
You click Windows Security in the Start menu or try to open Virus & threat protection, and instea...
Fix Windows Update High CPU Usage and Error 0x80070002
When Windows Update runs, you may see high CPU usage and eventually error 0x80070002. This usuall...
Fix Microsoft Store Invalid Configuration After Update
After a Windows update, you might open the Microsoft Store and see an error like "Invalid configu...
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Chrome Sync Fails with Multiple Profiles: How to FixFix OneDrive Error 0x8004de40: Sign-In IssuesFix Firefox Not Responding by Refreshing Your ProfileInstall Windows Terminal Offline on Windows 10Windows Activation Cache Removal GuideFix Windows Update Connection Refused on Windows 11Fix Microsoft Store Rate Limit Exceeded ErrorResolve Microsoft Edge Update Error 0x80070643