Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You click the installer, the progress bar moves, then nothing—or an error. Teams won't install on...

If you notice your system slowing down and Task Manager shows Microsoft Defender Antivirus Servic...

When you try to activate Windows or install an update, error 0x80070005 often appears with a mess...

If Windows Search stops returning results, runs slowly, or shows errors like "Search is not avail...

If you see an error like "Outlook module not found" when starting Microsoft Outlook, it usually m...

If you're using Microsoft apps on a Mac and notice that your settings, purchases, or data aren't ...