Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

View list

Fix Command Prompt Crashing After Run as Administrator

If Command Prompt opens and immediately closes or freezes when you run it as administrator, you'r...

Fix Windows Update Stuck on 'Checking for Updates'

You start your PC, open Windows Update, and it sits on 'Checking for updates' for 10, 20, 30 minu...

Fix Windows Activation Service Unavailable After Update

After a Windows update, you may see an error saying the activation service is unavailable. This u...

Fix Command Prompt Version Mismatch Error

When you open Command Prompt and see a version mismatch error, it usually means the system cannot...

How to Fix Outlook Proxy Authentication Failed Error

You try to send or receive email in Outlook and see an error: "Proxy authentication failed"

Fix PowerShell Offline Installer Permission Denied
When installing PowerShell from an offline installer, you might see a "permission denied" error. ...