Nginx 502 Bad Gateway: A Practical Troubleshooting Guide
Seeing a 502 Bad Gateway from Nginx usually means the upstream server (like PHP-FPM, uWSGI, or a ...
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesHow to Fix Windows Activation Login Loop
You sign in to Windows, but instead of your desktop, you see the activation screen again—over and...
Fix Windows Defender Token Expired Error After Reinstall
After reinstalling Windows or your security software, you might see a “token expired” error in Wi...
How to Fix Cloudflare Full Strict SSL Error
If you see a Cloudflare Full (Strict) SSL error, your site may show a 525, 526, or similar SSL ha...
Fix OneDrive Sync Error 0x8004de40: Practical Steps
You see error code 0x8004de40 when OneDrive won't sync. It usually means a corrupted cached file ...
Fix Chrome Profile DNS Error on Windows 10
You might see an error like "DNS_PROBE_FINISHED_NXDOMAIN" or "ERR_NAME_N...
Issue queue
SitemapChrome Extension Installation Checklist
How to Troubleshoot Windows Search 404
Task Scheduler Task Stuck on Ready: How to Fix
Fix Docker Container Restart Loop: Step-by-Step Guide
Windows Search Indexer CPU Fix
Checklist for Debugging 502 Bad Gateway in Command Prompt
How to Fix BitLocker Hanging on Boot Without Recovery Key
How to Fix Windows Terminal 404 Not Found Error
Resolve Teams Access Denied Issues
How to Unblock Internet After Windows Firewall Blocks It
Fix Outlook High CPU Usage Caused by Antivirus Scanning
How to Fix Chrome Profile Rate Limit Error After Update
How to Troubleshoot Windows Search 404
Task Scheduler Task Stuck on Ready: How to Fix
Fix Docker Container Restart Loop: Step-by-Step Guide
Windows Search Indexer CPU Fix
Checklist for Debugging 502 Bad Gateway in Command Prompt
How to Fix BitLocker Hanging on Boot Without Recovery Key
How to Fix Windows Terminal 404 Not Found Error
Resolve Teams Access Denied Issues
How to Unblock Internet After Windows Firewall Blocks It
Fix Outlook High CPU Usage Caused by Antivirus Scanning
How to Fix Chrome Profile Rate Limit Error After Update