I'm trying to format my C drive (something I've done a million times before, so I know what I am doing.. But it's the first time on this computer), but once I reach the menu (after starting up the computer from CDrom), my C drive is NOT on the list. It does list my secondary harddrive as my C drive, strangely enough (I can tell it's not actually my C drive because of the size and brand name). Then I tried just going into DOS with a startupdisk, and just typing format C.. but then it tells me invalid command/ C can't be detected. Anyone know what's causing this and how I can solve it? Thanks a lot for your help & time, very much appreciated!