Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If Git reports a lock file error after a crash, it usually means a previous Git operation was int...

You run npm install and get a wall of red: ENOENT: no such file or directory, ...

Fix Git SSL Certificate Problem: Unable to Get Local Issuer
When you run git clone or git pull and see an error like "S...

Fix Windows Security App Missing from Start Menu
You open the Start menu, type “Windows Security,” but nothing appears. The app may have been unre...

Fix Node.js Heap Out of Memory When Loading Modules
If you see FATAL ERROR: Ineffective mark-compacts near heap limit Allocation failed - JavaS...

Fix pip install: Dependency Conflict and Permission Denied
When you run pip install and see messages about dependency conflicts or permission d...