I have a hard disk with 3 partitions. Recently I noticed that I was losing a lot of disk space (5-6G). The total disk space used by all folders was must less than the 'Used space' reported by the property of the drive. After I purged the Norton Protected Recycle Bin, I reclaimed the lost space of my D: and E: but not my C:. I have another notebook which had the same symptom. My drive D: has the lost space reclaimed but not the C:. Where were the space used? Is there any utility out there which shows the disk space usage, all files and folders and these lost space as well?