Windows 7 Validation Error
 

So I got this new computer, a Dell XPS 8100, and it runs fine. I spend a week getting every setting fine-tuned and today it tells me my Windows 7 (Home, 64bit) isn't genuine. I tried reentering the key through the command prompt ( slmgr.vbs -ipk [key] ) and it gave me an error. I tried again. It...