Fix Nginx 502 Bad Gateway: Upstream Connection Refused
If you're seeing a 502 Bad Gateway error with "upstream connection refused" in your N...
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesFix Git Clone Connection Timed Out Due to Firewall
You run git clone and after a long pause see connection timed out. This...
Fix Windows 11 Update Stuck at 0% with Service Not Running
You click Check for updates, see 0% for ages, and maybe an error like 'Windows Update service...
Restore Windows Defender Real-Time Protection After Malware Disables It
If your Windows Defender real-time protection has been turned off and you suspect malware is the ...
Fix Remote Desktop Error 0x80004005: Credential and Network Checks
When you attempt to connect to a remote PC and see error 0x80004005, the connection usually fails...
Fix Windows Defender Real-Time Protection Not Turning On After Update
After a Windows Update, you might find that Windows Defender's real-time protection is stuck ...
Issue queue
SitemapHow to Resolve Windows 11 Update Blue Screen
Fix 521 Origin Connection Error After Server Update
Git Refusing to Merge Unrelated Histories After Clone
Windows Security App Not Opening Access Denied
How to Resolve Cloudflare Wildcard Permissions Denied
How to Fix ERR_NAME_NOT_RESOLVED in Chrome on Windows 10
Windows Python Command Not Recognized – Quick Fix
Fixing Python Memory Errors When Reading Large Files Line by Line
Fixing Non Fast Forward Errors When Pushing to Git
Chrome Access Violation on Print Fix
Fix VS Code Git Authentication Failure with No Prompt
Windows 11 Chrome Black Screen Troubleshooting
Fix 521 Origin Connection Error After Server Update
Git Refusing to Merge Unrelated Histories After Clone
Windows Security App Not Opening Access Denied
How to Resolve Cloudflare Wildcard Permissions Denied
How to Fix ERR_NAME_NOT_RESOLVED in Chrome on Windows 10
Windows Python Command Not Recognized – Quick Fix
Fixing Python Memory Errors When Reading Large Files Line by Line
Fixing Non Fast Forward Errors When Pushing to Git
Chrome Access Violation on Print Fix
Fix VS Code Git Authentication Failure with No Prompt
Windows 11 Chrome Black Screen Troubleshooting