How to Fix Cloudflare 521 Error with Firewall Settings
If you see a 521 Web Server Is Down error when visiting your site through Cloudf...
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesHow to Flush DNS on Windows 11 to Fix Internet Issues
If your internet seems slow, websites won't load, or you see DNS-related errors, a corrupted ...
Fix DNS Probe Finished NXDOMAIN Error on Mac
You're browsing on your Mac and suddenly a site won't load, showing the error DNS...
Fix Windows Search Indexing Error 0x80040c41
If you see error 0x80040c41 when searching in Windows, the indexing service is likely stuck due t...
Windows Update Service Not Running: Registry Fix Guide
If Windows Update fails to run, the service may be disabled or corrupted. This guide covers regis...
Fix Windows 11 Installation Assistant Stuck at 99%
You're running the Windows 11 Installation Assistant, it reaches 99%, and then sits there. No...
Issue queue
SitemapHow to Resolve ERR_CONNECTION_RESET on Android Chrome
Fixing Cloudflare 522 Errors Caused by Server Resource Exhaustion
Nginx PHP-FPM Connection Refused: How to Fix
Fix Chrome Extensions That Won't Load
Fix Windows Update Service Not Running in Event Viewer
How to Fix ERR_CONNECTION_RESET in Chrome
Fix Git Index Lock File Exists Error
Fix Windows Cannot Access Shared Folder Error
How to Fix Windows Update Service Not Running
Fix Cloudflare 521 Error: Step-by-Step
Resolve Git SSL Certificate Problem on Windows, macOS, Linux
Fix Git Detached HEAD by Creating a New Branch
Fixing Cloudflare 522 Errors Caused by Server Resource Exhaustion
Nginx PHP-FPM Connection Refused: How to Fix
Fix Chrome Extensions That Won't Load
Fix Windows Update Service Not Running in Event Viewer
How to Fix ERR_CONNECTION_RESET in Chrome
Fix Git Index Lock File Exists Error
Fix Windows Cannot Access Shared Folder Error
How to Fix Windows Update Service Not Running
Fix Cloudflare 521 Error: Step-by-Step
Resolve Git SSL Certificate Problem on Windows, macOS, Linux
Fix Git Detached HEAD by Creating a New Branch