Ashcrapper

if you have a lot in my documents etc you could shift that over to drive D to free up some space.

create a folder called "My Documents" on drive d then right click your normal my documents icon and click properties, click move then select the new folder you created on drive D. will then ask if you want to move all the files over as well, select yes.

also right click your C drive and click properties and do a disk cleanup, might free up a bit more