this problem has been F**king me up for weeks with these laptops with Vista, I clicked on your link but at first in "control panel" I couldnt find UAC in the "classic view" but it came up in the normal home page view, so clicked to disable the UAC and now I have managed to download the Paragon Back-up and Restore programme I wanted - I bet I will be able to download Quicktime now also!!! One thing though!! I keep getting a window popping up on the bottom task bar saying to "click here" to fix the problem, do you think I should put the UAC back on now or will it be OK to leave it disabled? Thanks alot for your GREAT help - the PCDIMWIT!!