I have the same system. As the other post says this is just a small 10g partition that contains the original Dell factory image files. You should not put any other files on this drive. Go into My Computer and move any files that you put in there. If I remember correctly there should be approx 1.5gig's free on this partition. I personally have formatted and deleted all extra partitions on my drive as I've gone with Win7 64bit. Hope this helps. Using the "clean-up or remove" option that you were talking about isn't going to clear up any space as that's only looking for temp files.
Perfect! Thanks a lot for the more detailed advice. I'll go ahead and give that a shot. I just wish I knew how I managed to get stuff saved in there in the first place. Oh well -- I don't guess THAT really matters now that I'm going to get the extra cr*p cleared out of there.