Alternatively you could use XXClone to copy the C drive to D. It is small, free and can clone an IDE, SATA or SCSI hard disk to either an internal disk or a USB disk. Only the professional version will do cumulative backups but this is perfect if an exact clone of the drive is needed. Get it here
http://www.xxclone.com/index.htm Click ‘Download’ in the left pane and select the freeware package version. It is intended for single installations that run Windows 95 through to XP, 32-bit only.
Here are a few tips on running the program:
Close down any other running programs before starting. Make sure you select the correct Target Volume. Before clicking Start to do the cloning process, you need to go to the Cool Tools Tab > Make Bootable and tick/run all three ‘options’ (Write MBR, Write Boot Sector and Write BOOT.INI). There is a ‘Duplicate Volume ID‘ option, which may be required by some antivirus programs that check for changes, Avast, certainly rejects the licence number as invalid. After cloning, compare the contents of both disks to ensure it has worked properly. There should be very little difference between them. Switch the disks over and boot the cloned disk, XXClone starts up and displays a Congratulations message, indicating that the cloning was successful.