I finally uninstalled my old nvidia drivers and the control panel and what-not. I had recently installed a Asus Silent Radeon 6450 in my eMachines el1358g-51w, and I updated my drivers and everything for it. When I finally got around to uninstalling the old nvidia drivers, I restarted my computer to complete the uninstallation. When it came back on, windows 7 Aero was off. I can't turn it back on. the windows minimize, and exit buttons are the old vista styles or whatever they are. I can't change my taskbar, and windows colors either. Yes, I have tried manually changing back to Aero. It doesn't do anything. I troubleshot my Aero settings and said I need to update my 6450 drivers. I checked the drivers again, and they ARE up-to-date. Please help! I would be very disappointed if I was stuck with this horrible looking window and task bar theme.