Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you see "Git authentication failed" when pushing or pulling in VS Code on a Mac, the p...

You run pip install and see errors like “package A requires package B==1.0 but y...

Fix Python UnicodeDecodeError with os.listdir
When you run os.listdir() on a directory containing files with non-ASCII names, you ...

Fix NET::ERR_CERT_AUTHORITY_INVALID in Chrome
When Chrome shows 'NET::ERR_CERT_AUTHORITY_INVALID', it means the browser cannot verify t...

Fix Windows Explorer Restarting with SFC Scannow
If Windows Explorer keeps restarting on its own—your taskbar disappears and reappears, or File Ex...

Fix Python Memory Error When Reading Large Files
When you try to read a file that's larger than your available RAM, Python raises a Memo...