I have a Vaio 530g which has a 160 gb hard drive . When I look in My Computer it lists c: total size 13.9 gb free space 199 mb and drive d: has 129 gb total and 121 gb free space. Is it possible to make d: my main drive somehow. I don't understand why this was partitioned this way. I am running Microsoft XP Home Edition version 2000 service pack 3.