I was able to grab the windows key that was loaded on the laptop from HP (from old hdd that won't boot into windows anymore.) But when I try to input it in (windows key pulled from old hard drive) it doesn't pass key reg. (don't have the hp disk to load from) just using a win 7 home premium load. Is there anyway to get this thing to reg w/out the sticker? I have the key from the windows registry on the old load but again not working. weird.