Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You open an Office file from OneDrive and see an error that the file is locked or in use by anoth...

If Windows Update fails with a “cannot connect” or “permission denied” error, it usually means th...

You open Outlook, and it hangs on the loading screen—sometimes showing “Loading profile” or just ...

You try to open or delete a file, and Windows says it's locked by Windows Security. This usually ...

Windows Security (formerly Windows Defender) can sometimes fail to open, show blank screens, or r...

You click Check for updates, and Windows sits there spinning forever—sometimes for hours—before s...