Checklists for software errors, setup, and tool workflows.

Fix Command Prompt Login Loop Not Responding

You sign in to Windows, but instead of the desktop, you see a command prompt window that appears,...

OpenVPN Connection Failed: Check Firewall Settings

You see "connection failed" in your OpenVPN client log. The server is reachable, but the handshak...

How to Fix Git Push Rejected Non Fast Forward Merge

You run git push and see an error: rejected – non-fast-forward. This happen...

Fix Windows Defender 404 Error in Command Prompt

When you try to run Windows Defender commands from Command Prompt and get a '404 Not Found' error...

Windows Defender Authentication Failed: Step-by-Step Checklist

You open Windows Security and see 'Authentication failed' when trying to use Windows Defender. Th...

Fix Git Clone Permission Denied (publickey) on Bitbucket

You try to clone a Bitbucket repository and see:

Permission denied (publickey).
fatal: Co...