MY computer for whatever reason made the boot drive the f:, how do I correct this back to the c:? I have a 250gb hard drive that was partition previously into 3 partitions and when I was installing windows XP it showed two of the partitions as unknown disks, leaving me with only 130gb of the 250gb available to be used. How do I reformat the whole drive to make the full 250gb accessible to hopefully cure the f: problem. Currently my C drive is the card reader.