Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You try to install a Python package with pip, and get an error like error: externally-manag...

Fix Nginx 502 Bad Gateway: Upstream Connection Refused
If you're seeing a 502 Bad Gateway error with "upstream connection refused" in your N...

Taskbar Icons Missing But Taskbar Visible: Fixes
You see the taskbar at the bottom of your screen, but the icons—like the Start button, search bar...

Fix Docker Build Context Canceled on Network Drive
You're running docker build from a network drive (NAS, SMB, NFS, or mapped drive...

Fix 'Permission Denied' When Using mkdir in VS Code Terminal
You're working in the VS Code integrated terminal and run a mkdir command only t...

Fix Bluetooth Device Not Detected on Windows 11
You try to pair a Bluetooth mouse, keyboard, or headphones, but Windows 11 doesn't see the de...