This has gotten me baffled. I had installed the trial version of Adobe Flash CS4 the other day, restarted my computer and it caused my computer to become unable to start-up. I perform a system restore before I had installed it and all of the sudden Aero stopped being able to do anything but the default solid color theme. Whenever I try and troubleshoot it says that another mirror driver is running and to disable it before trying again, but I don't have anything else running. I've re-installed my video card drivers and all that but I just can't seem to figure out what happened here. Any suggestions would be very helpful! Thanks so much.