Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

After a Windows update, you might find that your Microsoft Store apps refuse to update. They may ...

When you call exec('ffmpeg ...') in PHP and get ffmpeg command not found

Fix Docker Build Error: 'failed to solve: manifest not found'
You run docker build and get an error like:
failed to solve: error fetching ...

Fix Error 0x80070643 When Windows Update Stuck
You click "Check for updates" and Windows Update hangs or fails with error 0x80070643. This usual...

Fix 504 Gateway Timeout in Command Prompt
If you see a 504 Gateway Timeout error, it usually means a server upstream (like a proxy or gatew...

Fix Chrome Token Expired After Password Change
After changing your password for a web service, Chrome may show an error like “token expired” or ...