I have Windows XP-2 OS installed on ‘C’ drive having capacity of 10 gb. I can not defragment this drive because there is only 600 MB space is availabe. But when I calculate by adding utilized space by Documents & Setting, Program files, Windows, MSOcache…folders, it is showing near about 5 GB space used on this drive by thease folders that means 5GB should be remained but ‘C’ properties showing only 600 MB. Where is the remaining space? please help…:(