How to Fix Cloudflare 521 Error Due to Proxy Issues
If you see a Cloudflare 521 error, the message usually says something like “Web server is down.” ...
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesWindows 11 Update Stuck at 0%: Practical Checklist
You start a Windows Update and it hangs at 0% for 10, 20, 30 minutes. This is a common frustratio...
Firefox Secure Connection Failed: How to Fix
When Firefox shows 'Secure Connection Failed' or similar warnings like 'PR_END_OF_FIL...
Windows Security App Not Opening as Administrator: Fixes
When you try to open the Windows Security app and it fails to launch, often with no error message...
Fix npm ENOWENT Package.json Not Found on Mac
If you see 'ENOENT: no such file or directory, open /path/to/package.json' when running n...
Fix Git Merge Conflicts with Deleted Files
You're in the middle of a merge and git stops with a conflict. One side deleted a file, the o...
Issue queue
SitemapDocker: No Space Left on Device After Pulling Image
Firefox Secure Connection Failed: Date and Time Fix
Chrome Extensions Grayed Out: Fixes That Work
Stop File Explorer Crashing: Disable Shell Extensions
Fix Git SSL Certificate Verify Failed: Unable to Get Local Issuer
package-lock.json Conflict Guide
How to Limit Chrome Tab Memory Usage
Python venv Not Working on Windows 10: Common Fixes
Firefox Secure Connection Failed Due to Proxy – Fix Guide
VPN DNS Probe NXDOMAIN Error Fix
Cloudflare DNS Propagation Tips
How to Restart Windows Update After SFC Scan
Firefox Secure Connection Failed: Date and Time Fix
Chrome Extensions Grayed Out: Fixes That Work
Stop File Explorer Crashing: Disable Shell Extensions
Fix Git SSL Certificate Verify Failed: Unable to Get Local Issuer
package-lock.json Conflict Guide
How to Limit Chrome Tab Memory Usage
Python venv Not Working on Windows 10: Common Fixes
Firefox Secure Connection Failed Due to Proxy – Fix Guide
VPN DNS Probe NXDOMAIN Error Fix
Cloudflare DNS Propagation Tips
How to Restart Windows Update After SFC Scan