just got a new hard drive of 320gb, as it says on its sticker, when i go to install it and install windows on it, in the bios it reads as 320gb, but when i go to install windows on it is comes up as 120. ive tried wiping the hard drive and reformatting it using the windows disc, and still comes up with the same problem, ive now got it 120 but in a raw format and as a result wont install windows or evan format it. can someone help me please?