Checklists for software errors, setup, and tool workflows.

OpenVPN Connection Failed: Check Firewall Settings

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

Fix Jupyter Notebook Token Not Working on Mac

You launch Jupyter Notebook on your Mac, see the token URL in the terminal, copy it into your bro...

Fix Command Prompt Permission Denied Error in Windows 11

When you see a 'permission denied' or 'access denied' error in Command Prompt on Windows 11, it u...

Resolving PowerShell Version Mismatch in Automation Scripts

You're running an automation script and get an error about a cmdlet not being recognized, or a pa...

Fix VSCode Extension Host Terminated Error Code 0

What does this error mean?

When you see 'Extension host terminated unexpectedly with erro...

Fix Windows Activation Blank Screen via Registry

After activating Windows, some users see a blank screen with only a cursor. This usually points t...