Fix Windows Security Antivirus Not Turning On
You open Windows Security and see that the antivirus is off, with no obvious way to turn it on. T...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix Windows Activation Error 0x8007007b on Ubuntu
If you see Windows activation error 0x8007007b while using Ubuntu (for example, in a dual-boot se...
Nginx 502 Bad Gateway: Troubleshooting Checklist
If you're seeing a 502 Bad Gateway from nginx, it usually means nginx can't reach the upstream se...
Fix BitLocker Rate Limit Error After Multiple Attempts
You’ve entered your BitLocker PIN or recovery key several times, and now you see a rate limit err...
Fix SSL Certificate Errors in Windows Search
When Windows Search throws an SSL certificate error—often as 'The certificate is not valid' or 'A...
Fix Microsoft Teams Stuck on Loading with Error Code 0xca
If Microsoft Teams gets stuck on the loading screen and shows error code 0xca, the app can't star...
Topic paths
Quick titles
BitLocker Configuration Error Troubleshooting GuideFix Microsoft Teams 504 Gateway Timeout ErrorWindows Defender High Memory FixWindows Update Reset GuideKubernetes CrashLoopBackOff Troubleshooting GuideWindows Update Settings for Ubuntu Dual-BootResolve Chrome Profile Network Error in Windows 10Resolve Windows Search Version Mismatch