Checklists for software errors, setup, and tool workflows.

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Fix Nginx Upstream Connection Refused Socket Error

When Nginx returns a 502 Bad Gateway or logs upstream connection refused

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...

Windows 11 Blue Screen After Cumulative Update: Fixes That Work
After installing a cumulative update, some Windows 11 users encounter a blue screen error (BSOD) ...

Fix Git 'index.lock file exists' Error
If you see fatal: Unable to create 'path/.git/index.lock': File exists. when...

Fix npm run build: Module Not Found Error
When you run npm run build and see a Module not found error, the bu...

Fix 'Permission Denied' Error When Saving VS Code settings.json
You open VS Code's settings.json (either user or workspace), make a change, and try to save. ...

Checklists for software errors, setup, and tool workflows.

Latest checklists

Fix Nginx Upstream Connection Refused Socket Error

Fix Windows 11 Update Stuck at 0% with Service Not Running

Windows 11 Blue Screen After Cumulative Update: Fixes That Work

Fix Git 'index.lock file exists' Error

Fix npm run build: Module Not Found Error

Fix 'Permission Denied' Error When Saving VS Code settings.json

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