>>143075Actually it's more complicated than that.
You need to go XP, Vista, 7, 10.
>>143079You could buy a "FQC-00130" Windows 7 retail upgrade. It's a genuine Windows licence, so long as you have a genuine Windows XP. They go for $70-$100, used on places like Amazon and eBay.
The advantage of retail is that the license is transferable from person-to-person, and from computer-to-computer. You can upgrade it to Windows 10 Retail and transfer that license too.