I have a 40 Gb hard drive over two drives. The C: drive is the regular hard drive with 37 Gb of space and the D: drive is a recovery drive with 3 Gb used. Windows XP uses around 4.5 Gb of my C: drive so I basically have 32 Gb free. The only problem is that under the C: drive I have 9 folders, program files, my documents etc. I clicked on properties to see the size of each folder and all together they are taking up a total of 9 Gb, but yet when I click on properties for the C: drive it says I am using 16 Gb. I am missing 7 Gb of my hard drive and I have no idea where it went. I could understand maybe a Gb or two but 7 is just ridiculous. Anybody have an explanation other than formatting my hard drive?