Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you see error 407 (Proxy Authentication Required) when using Command Prompt for network operat...

If you've enabled Files On-Demand but still see all files downloaded or missing cloud icons, a fe...

You may see the error 'BitLocker cannot connect to Windows Hello' when trying to set up or manage...

You're using Outlook and suddenly it asks for your password repeatedly, or shows an error like 'Y...

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

If Windows Update fails with errors like 0x80070002, 0x80073712, or simply hangs, the update conf...