Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you see 'Windows Defender module not found' when trying to open Windows Security or run a scan...

If the Microsoft Store won't load, apps fail to download, or updates get stuck, a corrupted cache...

You might see the error "Windows activation module not found" when trying to activate Windows, or...

You open Windows Security and see a yellow warning: “Threat service has stopped. Restart it now.”...

After a Windows update, you might see an activation error or a watermark saying your copy isn't g...

If you see 'Windows activation authentication failed' when trying to activate Windows, the issue ...