I had to get to Drive Management in a different way (probably UK version of XP Home) for your future reference
Start > Control Panel > Administrative Tools > Computer Management > (left side) Storage > Disk Management
I hope this answers your question:
Volume, Layout, Type, File System, Status, Capacity, Free Space
C,Partition, Basic, NTFS, Healthy(system), 18.68 14.17 GB
D,Partition, Basic, ....... ,Healthy, 37.28, 37.28 GB
I backed up data from the C drive to the D drive, seperate drives. I then reinstalled the system onto the C drive which was reformatted in the process, the D drive was not reformatted. I assume that it must have been damaged in some way , there were no accessibility problems before reinstallation on C.