Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

When you run npm install or npm start and see npm ERR! package.js...

Fix NET::ERR_CERT_AUTHORITY_INVALID via Chrome Enterprise Policy
If you see NET::ERR_CERT_AUTHORITY_INVALID in Chrome on a managed device, the is...

How to Rebuild Taskbar Icon Cache in Windows 10
If your Windows 10 taskbar icons appear blank, wrong, or missing, the icon cache may be corrupted...

Git index.lock File Exists Even After Deleting: Fixes
You delete the .git/index.lock file, but Git still says it exists. This can happen d...

Fix Python UnicodeDecodeError in Requests Library
You're using the requests library in Python and suddenly get a UnicodeDeco...

Fix Nginx 502 Bad Gateway: Upstream Connection Refused
If you're seeing a 502 Bad Gateway error with "upstream connection refused" in your N...