More information will be better. 'A few months ago, somewhere'? Just because you did a Disk Cleanup?
To solve the problem, you may try this: open C:\Documents and Settings\ 'User' \Local Settings\Temp. These files could be deleted. Then check whether there are many hidden files.
I am using Windows XP on a Lenovo Thinkpad with 120 GB of memory. I noticed a few months ago, while doing a Disk Cleanup, that my free space went from somewhere around 30+ to 4! I had done no major changes on the computer.
Now I am unable to run the defragmenter effectively, and have been unable to back up my computer b/c it says there is not enough free space. Someone suggested downloading spybot and running that, but there was no change.
Does anyone know of any reason why this would happen, and any possible solutions to fix it? Any help is appreciated! I just got this computer, didn't think I'd have to add memory to it so soon!