I am in the process of adding programs to a friends new Toshiba Laptop which on checking as 16GB of files on it. This appears to me to be a lot considering it is a new Vista PC and as very few programs on it, explorer tells me it as 16GB.
Normaly I would expect about 6GB on an XP new PC.
On reading its spec for this Toshiba it says it as a hidden recovery partition but I cannot see it.The partions are set at C and E with D missing which again seems strange. When I did an Acronis Image backup it altered the Disk partions to C ,with D for the External Backup Drive and E. Does this give any clues.
Try Aministrative Tools > Computer Management > Disk Management The partition should be shown there without a drive letter. If so right click on it and select change drive letter and pah and assign it a letter.