I own an original MS Windows copy because of my laptop. I don't use it at all but someday (don't remember when) I installed and activated the serial number, now trying to using it through VMWare and... Microsoft refuses my serial number, reason? You have already used this activation number... now what? Do I need to buy another copy? FORGET IT!
Deluded Mario, who though (again) that using original copies were the answer. I really tried, but allowing only few activations is a pain in the ass. I need to activate for using the OS... WTF!!
I don't even use it everyday... I won't pay anything.