Building a new computer, and I have purchased everything but the OS. Is Newegg the cheapest place to get Windows at $100? I am a grad student if that helps, but I'm not in any computer science classes, so I struck out with Dreamspark, and I'm not aware of my school having the Microsoft discounts. I have a 32 bit version on an old laptop, and I wondered if there was a way to transfer that, but I will obviously need 64 bit on the new desktop.