I have chronic space problems on my harddisk's system partition (using Windows XP here). Usually around only 200-300MB free. Now I recently deinstalled Java and I ran a disk cleaner which made a few MB free. Sometimes restarting Firefox frees up about 100MB as well.
I now was at around 450MB last time I looked at the bottom of the Explorer window. I went on gaming with MAME for the last two hours and just looked at the free space again. I suddenly have 1.1GB free.
I checked the trashcan to make sure I didn't delete anything by mistake.
How come I suddenly had 600MB freed up?