Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

After a Windows update, you might see "Authentication failed" when trying to sign in to the Micro...

You see 'Windows activation service unavailable' and you don't have the product key. This usually...

If you've changed Command Prompt settings—like font, colors, or layout—and they don't stick or be...

If you're seeing a '502 Bad Gateway' error when opening Windows Defender, it usually means a netw...

You try to install a package with apt or dpkg, and you get the error: Could not get lock /v...

Fix Command Prompt Update Error After Reboot
You restart your Windows machine, open Command Prompt, and see an update error. This usually happ...