I'm running Windows Vista x64, and im trying to shrink my Main C: Drive to make room for the Windows 7 beta. It says I have 46gb free that are available for shrinking. I punch in 17000mb to shrink and hit enter, and it keeps telling me that "Access is Denied" and i dont have permission to do that to my C: drive. I am an Admin, and i checked to make sure i have full rights. I even went in and just changed the ownership of the drive to me (who knows why it was set to "TrustedInstaller"). Still doesn't allow me to shrink it. Any ideas?