Im helping my friend build a computer and we're trying to find Windows 7 home premium full retail, NOT OEM, but cant find it anywhere. I recently built a computer myself roughly 2 months ago and bought Windows 7 for myself. I've gone back on my order histories on the websites I purchased my parts from but couldn't find Windows 7 anywhere in my purchase history so for some reason it was removed. It cost me $200 but the only one I can find is $400 on Amazon which is ridiculous. Can someone tell me where to find Windows 7 for ~$200?