Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you need to record everything that happens in a Command Prompt session—for troubleshooting, au...

When you try to connect to a remote computer and see error 0x8007042c, the remote desktop service...

You try to update Windows Defender and see error 0x80070643. This usually means a Windows Update ...

You open Windows Security and see the message 'Windows Defender service unavailable' or 'Windows ...

Windows Update can get stuck or fail with errors like 0x80070002 or 0x8024401c when the update ca...

If you see the error 'Windows activation failed to start Windows 10' when trying to activate, it ...