Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

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

Fix Python venv Not Activating in VS Code Terminal
When you create a Python virtual environment but it doesn't activate in the VS Code terminal,...

Fix npm Global Install Permission Denied Without Sudo
When you run npm install -g and see "EACCES: permission denied", it's be...

Fix 'npm package json not found' Error When Using npx
When you run npx some-package and see an error like “npm package json not found”...

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...

Fix Windows Update Error 0x80070002 Using DISM
If you see Windows Update error 0x80070002, it usually means the update system can't find a n...