Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you see “fatal: remote origin already exists” when trying to git remote add origin

Fix pip Externally Managed Environment Errors
If you're on a modern Linux distribution and see error: externally-managed-environment<...

Troubleshoot Windows Cannot Access Shared Folder
When you try to open a shared folder from another computer and see 'Windows cannot access \\c...

Fix Windows Update Error 0x80070002 After Update
After a Windows Update, you may see error 0x80070002. This usually means the system can't fin...

How to Enable Chrome Extensions That Aren't Loading
You open Chrome and see a grayed-out extension icon. Clicking 'Enable' does nothing, or t...

How to Generate a Cloudflare Origin Certificate
If you're using Cloudflare as a reverse proxy, you may want to encrypt traffic between your s...