When I try to install QuickTime Pro (7) onto my MacBook Pro (running Snow Leopard) I am getting the following error message: QuickTime can't be installed on this disk. THis version of QuickTime 7 can't be installed on this disk because QuickTime X is already present. Please use Software Update to install the appropriate version of QuickTime for your Mac. I have tried opening Software Update (in System Preferences) but it offers no solution and doesn't even list QuickTime in the list of Installed Software. Does anyone have any solution to this problem? Alternatively the reason I am attempting QuickTime Pro is because I need to grab a still from a video (I could do this with Pro back when I was using Leopard and Tiger) is there a different way of doing this now in Snow Leopard?