Al recently bought a laptop from Walmart. He likes to dual boot with Linux, and Al is concerned if he messes it up and has to reinstall Windows 10, how can he find the activation code to reinstall Windows 10? Is there a software that can read the registry? Leo says you don't have to worry about that anymore. Windows 10 will recognize your laptop and will automatically authorize it. It's called an "entitlement," and it applies to the hardware, not the owner. But if you still want it, check out Belarc Advisor.