I'm trying to shrink the main partition on my new pc with Windows Seven 64 bits preloaded from 500Gb to 100Gb. Unfortunately, some files prevent any attempt to go below 290Gb. See screnshot: http://i40.tinypic.com/14eccp3.jpg I have already disabled restore points, as somebody had suggested, but nothing changes. What have I to do to further shrink this partition?