A funny thing happens when you look for a product key in Windows 10 after doing the free upgrade: You won’t find them.
In Windows 10, utilities like Magical Jelly Bean KeyFinder or Belarc Advisor return generic product keys instead of authentic ones. Don’t believe me? This is the key Windows 10 Pro users will see in KeyFinder or Belarc Advisor: VK7JG-NPHTM-C97JM-9MPGT-3V66T.
Let’s try this PowerShell script from the Hexus forums on Windows 10 Pro. You should get this: T44CG-JDJH7-VJ2WF-DY4X9-HCFC6. That’s the generic key for build 10240.
Not a real product key to be seen anywhere.
The reason for this is that Windows 10 changes Microsoft’s traditional product key model, and if you ask me it’s for the better.