I took the hard drive out of my old HP desktop. I bought it in 2005 so it is very slow, but it had Win7 in it before I retired it. And my current machine isn't that much newer, purchased in 2000, but with lots of upgrades (so many that not another thing can be crammed inside it).

Too bad HP stopped making most of their desktops. I custom ordered machines in the past. Next one will probably be a Dell and I'll customize it myself.