...It initially didn't show up in 'Computer' (or My Computer). Device manager said its working properly. I put the Vista Disc in (had to get a pirate one from someone because my disc drive won't read the official one all of a sudden) and tried to install Vista on this one as a way of forcing it to show, only to get an error code 0x8007000cl. I then split the new 1.5 tb drive into 98 gb and about 1300 gb via the vista DVD's drive list that comes up, partitioned the 98 gb, and now that smaller one at least shows up under 'Computer' but it still wont allow me to format it. Any ideas please? Thanks.