I have an Alienware Alpha that I never used for sale on eBay. It came with Windows 8.1. I did an in place upgrade to Windows 10 Creator's update and I'll be a monkey's uncle if it didn't activate. I checked it and it was activated. If I knew that worked, I would have installed Windows 7 on another machine and did an in place upgrade instead of reusing a 10 license that was dormant.