There is no way I only have 500MB (and decreasing, as we speak it's at 348) on the desktop. This number really fluctuates for me. I looked at it once after loading windows and I had almost 4GB free, which I've never seen before. Everything seemed to be running faster, programs loading quicker. Normally I see about 1.5GB free.
But, 348MB? What could possibly be going on that would cause only that little bit to be free?