Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you're behind a corporate firewall and see SSL: CERTIFICATE_VERIFY_FAILED when ru...

When installing or updating apps from the Microsoft Store, you may see an error like "File locked...

If Windows activation fails or you're troubleshooting licensing issues, the activation log file (...

You restart your Windows machine, open Command Prompt, and see an update error. This usually happ...

When downloading a file in Chrome on Ubuntu, you might see an error like Failed - Error cod...

How to Fix Windows Activation Network Error
You try to activate Windows and see an error like “We can’t activate Windows on this device becau...