Okay I had origanaly bought Windows Vista 64bit HP OEM for my computer. Down the road I downloaded the 64bit Windows 7 while I was in University. I only had a WD 120gb drive, and I now have 50mb of empty space :( (Computer is running way slow, and I need to have more sapce) so I bought a Segate 500gb 7200rpm drive... anyways I wanted to know, how can I instal 7 onto my new drive and use my current one as a slave... My main problem is I don't have the disk for Windows 7 b/c it was an upgrade, but I do have the verified serial number. I cannot contact Microsoft b/c they want to charge me 70$ just to talk to one of their support people... (rediculos, almost the cost of another OEM). I guess the way I would like to do this is instal the second hard drive and copy everything over to it, and then boot from that drive and wipe the one I'm using now... possible??