We have several computers between our house & shop. One had Windows 10, a lap top. The rest had Windows 7, all desktops. My wife's computer & the main computer in the shop were over 8 years old Windows 7 machines. We replaced those 2 with new windows 10 computers. I decided to upgrade those to Windows 10.
While searching for the best place to purchase the Windows 10 software & how to go about upgrading the older computers, I came across a youtube video that was a great help.
I upgraded 2 computers today & have 2 more to go. All trouble free & activated. You do have to start out with an activated legal copy of Windows on your computer.