If you’re looking for a good free space analysins software for Windows check out – http://www.pc-freak.net/files/spacesniffer_1_2_0_2.zip
The program visualizes your whole hard disk it is an amazing thing to see your hard disk occupied directories and files to show in a different sized squares according to the volume of data. Spacesniffer is very useful if you need to clean up full C: drives which – a very often program in Windows.