I'm just installed 7 Ultimate (clean, full install) on my Dell XPS M1530 laptop. So far, so good although I do not really notice much difference in performance. I do have one minor complaint. I cannot get the slider volume control in the taskbar to open or stay open. The volume icon is there but it only flashes the slider control for about a second and will not stay open. To change volume, I have to right click and open the volume control panel. Does anyone have any suggestions to remedy this issue? Thanks.