Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you see an error like fatal: Unable to create 'path/to/repo/.git/index.lock': Fi...

How to Fix Firefox Secure Connection Failed Malware Warnings
If you see a "Secure Connection Failed" error in Firefox and suspect malware, it's of...

Fix Git SSL Certificate Problem: Unable to Get Local Issuer Certificate
When you run git clone, git pull, or git fetch over HTTPS,...

Fix Git Merge Conflicts with Deleted Files
You're in the middle of a merge and git stops with a conflict. One side deleted a file, the o...

Fix VSCode Breakpoints Not Hit in launch.json
You set a breakpoint in Visual Studio Code, start debugging with a launch.json confi...

Remote Desktop Connection Fails: RDP Port Not Open
You try to connect via Remote Desktop, but the client says it can't connect. One of the most ...