Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

View list

Fix 'Windows Defender Not Recognized' Error in Command Prompt

When you type MpCmdRun or Windows Defender in Command Prompt and see

Fix Windows Defender Blank Screen in Windows 10

If you open Windows Defender Security Center in Windows 10 and see nothing but a blank white or g...

How to Fix Windows Update Invalid Configuration Error

You try to run Windows Update and get an error saying the configuration is invalid. This usually ...

Fix Windows Defender Slow Startup in Windows 10

If your Windows 10 PC takes longer to boot up and you suspect Windows Defender is the cause, you'...

Fix pip install no matching distribution found offline install

When you run pip install somepackage on an offline machine and get “No matching ...

Find the Windows Update Log File Location in Windows 11
If you're troubleshooting a failed Windows Update on Windows 11, the first step is to check the u...