Please don't tell me to get an Apple

OK, so I moved a whole bunch of files to a different drive (no program files, just mp3s and vids and such). It totalled lik 19 gigs and I thought by freeing of the space on my C drive (which only had about 1.50 gigs left) this would save th day. I also installed a 300 gig external Maxtor backup drive that keeps track of changes, etc. My problem now is, my computer is running at a snails pace and constantly freezes for 10 minutes at a time often. I ran virus checks, adaware, and Norton's defragger (speeddisk I think). I also check the hdd and am told it has no errors...

Any ideas, fellas?

B