Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you see an error like Error: unable to verify the first certificate or SSL ...

UFW Port Closed Despite Allow Rule: Fixes
You've added a UFW allow rule for a port, but a port scan or service test shows the port is still...

How to Set Up Microsoft Store on Ubuntu 22.04
You want to run Microsoft Store apps on Ubuntu 22.04, but the Store is a Windows application. The...

Fix Task Scheduler Showing Empty Window
You open Task Scheduler and the main pane is blank—no tasks, no columns, just gray. This usually ...

How to Break a Login Loop Using Command Prompt
You enter your password, the system spins, and then you're back at the login screen. This login l...

PowerShell Not Found After Installation: Fixes That Work
You installed PowerShell — maybe the latest version — but when you type powershell o...