Yes, the OEM can be used on another computer after you’ve already installed it onto one. Will you be in compliance with the EULA? No, you will not. So, in order to get it to install on another machine you will have to lie to the Microsoft rep. Do I condone this activity or behavior? No. But I wanted to make sure that everyone knows that you’re not dead in the water once your motherboard or hard drive dies. You will still be able to get Vista back onto another computer and still be able to use its full features. I say this is better than pirating Vista, don’t you?
Here is proof.