Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You start a new Visual Studio installation or update, and the progress bar stops at “Downloading ...

When you see the error "port already allocated" related to Windows Defender, it usually means ano...

If you're seeing a 502 Bad Gateway from nginx, it usually means nginx can't reach the upstream se...

You run a full virus scan in Windows Security, and it gets stuck at 99% for minutes or hours. Thi...

You try to send or receive email in Outlook and see an error: "Proxy authentication failed"

Fix Windows Defender Blank Screen in Windows 10
If you open Windows Defender Security Center in Windows 10 and see nothing but a blank white or g...