請各位先進幫幫忙吧
小弟灌軟體時出現了下面的訊息

error copying files:

there is not enough space on the C: drive to complete the installation.
the installer needs about 7MB of space for temporary files.
you need to free some space on this drive,or change your TMP
environment variable to point to a drive that has more space.

小弟的HD是40G的,還用不到一半說
應該不會連7M的tmp還不夠吧
在98,2000,XP的os都會出現這種訊息
請各位幫小弟個忙,謝謝~~!!!