Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

View list

How to Fix Command Prompt Permission Denied in Safe Mode

You boot into Safe Mode to run a repair command, but Command Prompt throws 'Access Denied' or 'Pe...

Fix Outlook File Locked by Outlook.exe Not Responding

If you see an error that your Outlook data file (.pst or .ost) is locked because Outlook.exe is n...

Fix Remote Desktop 504 Gateway Timeout on Windows 10

If you see a "504 Gateway Timeout" error when connecting to a remote desktop on Windows 10, the c...

Fix PowerShell Stuck on Startup in Windows 10

If PowerShell appears to hang or become unresponsive every time it starts on Windows 10, the issu...

Fix Windows Activation Command Error 0x80070002

When you try to activate Windows using the command line—for example, running slmgr /ato

Fix 'Not Recognized as Internal or External Command' Error
When you type a command in the Command Prompt and see 'is not recognized as an internal o...