Well seems to me that if your low on disc space, no these files won't be available. Where would they have D/Led to?? I don't think files can just float around.
You could try a Search of your HDD and see if they show up.
The only solution is to try and Free up some Disc Space. Make sure to defrag also.
I would recommend D/Ling CCleaner. This will also help with your Clean Up.
See CCleaner in my Sig.
