Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You try to install Windows updates and see error 0x80070005, often with a message like "Access de...

When you see "permission denied" or "authentication failed" in Command Prompt, it usually means y...

You've waited for a Windows update to finish, but it's stuck at 100% for minutes or hours. This i...

If you see error 0x80073cf9 when trying to install or update an app from the Windows Store, it us...

If you see a "504 Gateway Timeout" error when Windows Defender tries to sync, it usually means th...

If you're running Windows Defender on a Mac via virtualization or Boot Camp, you may run into iss...