I installed Windows 7 Pro using an update package from Windows Vista Home. My issue is this. If I right click my C: (Primary Partition) it says I have over 70 gigs of space used. If I go into the root of C: and "Select All" with Hidden and System files showing, I am just over 40 Gigs. Which is real and why are they showing differently? I have run a Disk Clean-up, cleared about 500 MB.... and a Defrag, neither really impacted the size. The system is formatted using NTFS. Any suggestions would be great as to what my problem is. Thanks!