I have a HP Compaq 6000 Pro SFF with WIN 7 Pro 64-bit operation system OEM installed, and SP1 and windows activated. For the life of me I cannot get it to upgrade to WIN 10 Pro. It downloaded the WIN 10 and went through it's cycle till it came to "searching for updates" and it has been searching for updates for 29 hours. I would guess there's no more updates to be found or to be installed before this Microsoft WIN 10. aka pile of crap will never get installed on this PC. Surely, there is a solution to the problem, but, Microsoft left their upgrade desk and went out partying and drinking for the past 10 months.