Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

After a Windows update, you might open Settings and find that Windows Defender (now called Micros...

You try to open Outlook and get an error that the PST or OST file is locked by Windows file shari...

If you use Windows Terminal on multiple computers, you may notice that changes you make on one ma...

If you're seeing a 404 error in Microsoft Teams—often when opening a chat, channel, or file—it's ...

You try to launch Microsoft Teams from the terminal or a script, but see an error like micr...

Fix Windows Security High Memory Usage
If you notice Windows Security (formerly Windows Defender) using excessive memory—sometimes hundr...