Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If Chrome crashes immediately upon launch, or opens to a blank page before closing, malware may b...

You open Chrome, click the profile icon, and see the never-ending 'Waiting for sync' mess...

If you use SourceTree and see an error message like fatal: Unable to create 'path/to/.g...

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

How to Remove the Externally Managed Environment Flag in pip
If you're seeing error: externally-managed-environment when using pip on a moder...

Fix Firefox Secure Connection Failed on Windows 10
You're browsing in Firefox on Windows 10 and get a full-page error: Secure Connection Fai...