Prophecy, I'm new here, but I've got the feeling that this guy's expecting people to e-mail him the solution. And yes, he definitely didn't give enough details.
I've found Win 7 to be a fairly trouble free upgrade as far as upgrades go. I've upgraded three systems with an upgrade family pack. On one of them, I replaced the hard drive with a bigger & faster one; I was able to an upgrade install on a clean hard drive. I was prepared to install Vista and then upgrade but found a workaround off of the 'net.