For Compaq PC users who have a "D" partition on their hard drive,
there is now a service pack SP22827 which will eliminate the
partition. The following is from the web site;

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This application creates a bootable diskette, which can be used to
delete the D: Partition installed on certain Compaq Presario
computers. This application may be used on Compaq Presario computers
with partitioned hard disk drives to remove the D: Partition and
expand the C: Drive to include all the space that was included in the
D: Partition. Please refer to the main text to insure that your model
is listed.