are you saying you have 2 hard drives, one 16gb and the other 40gb.
or 2 partitions on one hard drive , one 16gb and the other 40gb.
in either case sounds like you are short on disk space in general and could use a larger hard drive.
might consider purchasing 1 or 2 larger hard drives.
use the program from the manufacturer of the hard drives to ghost the old drive(s) to the new drive(s).
you do not mention the REAL sizes of the drives so the idea of moving the data around to make the "D" drive the new bootable does not make much sense.
you might perform some GOOD disk cleanup. move data from ":C" to "D" and remove some old restore points to make more room on "C".
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"neverontuesday" <meadows28> wrote in message My C drive is limited to about 16gbs - whereas my D drive has 40gbs. How do
I make the D drive my primary drive. (I have Windows XP).