Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you're running a local development server or an internal application with a self-signed or pri...

If Windows Defender won't start, you may see an error like "This app has been turned off" or "Win...

You install a Chrome extension, but it doesn't appear in the toolbar, or it's grayed out, or it j...

When you open Windows Security and click on 'Threat history', you might see a spinning circle fol...

After a Windows 10 update, OneDrive may stop syncing entirely or show errors like "Changes haven'...

You see the message 'Windows Update configuration failed. Reverting changes.' after a restart. Th...