I want to buy a cheap license for Windows 10 that I can install on my Macbook using VMWare Fusion, or maybe a Bootcamp partition. I am concerned about activation. I understand that Microsoft bases activation on the hardware, and this might be a problem with a virtual machine. I see lots of licenses being sold inexpensively on eBay, and I wonder if this would do the trick. Are they legit? Can I use one of these license keys to install Windows 10 as a virtual machine using VMWare Fusion, and if I need to install it again some day in a different virtual machine, will it work? I guess I'm confused about Windows 10 licensing. Can anyone help me with this? What should I look for if I buy a license on eBay? Thanks!