Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

View list

Fix Windows Activation File Locked Registry Issue

You try to activate Windows, but get an error saying the activation file is locked or the registr...

Fix Windows Defender Stuck on Loading Black Screen

If Windows Defender (Microsoft Defender Antivirus) hangs on a black screen with a spinning or fro...

Fix Windows Update Offline Installer Not Working on Windows 10

You download the .msu or .cab file for a Windows 10 update, double-click it, and nothing happens—...

Windows Terminal Service Unavailable Checklist

When you see 'Terminal Service is unavailable' or 'Remote Desktop Service is currently busy' on a...

Remote Desktop Command Not Found: Setup and Fix Guide

You typed remote desktop or a related command in the terminal, and got back co...

Reset Windows Activation Timer Using slmgr Commands
If you're seeing a Windows activation warning and need to reset the activation timer, the built-i...