Checklists for software errors, setup, and tool workflows.

Fix VS Code Git Authentication Failure with No Prompt

You try to push or pull in VS Code and see an error like "Git authentication failed" but ...

Fix Remote Desktop Connection Failed Due to Group Policy

You try to connect to a remote desktop, but it fails with an error like "The connection was d...

Windows Security App Not Working After Update: Fixes

After a Windows update, the Windows Security app may fail to open, show a blank window, or displa...

Fix Nginx 'upstream connection refused' When Talking to PHP-FPM

You're seeing upstream connection refused in your Nginx error log, and your site...

How to Fix Git Detached HEAD Error

You run git status and see "HEAD detached at" followed by a commit hash. Thi...

Fix Git 'index.lock' File Exists Error on Linux

When working with Git on Linux, you might see an error like:

fatal: Unable to creat...