my hard disk is: WDC WD7500BPKT-00PK4T0 of 750 GB: http://moby.to/g91i0x
on my windows 7 professional 64 bit laptop when I go to: Computer Management>Disk Management I see this: http://www.mobypicture.com/user/cypherinfo/view/15374920/sizes/full
So more than 100 GB the size of my hard disk (750 GB). I already run: CHKDSK and a dos command to verify the OS integrity and no issue was detected! I wonder why that appears and how to fix it please?