I have been using aero on my system running on windows 7 and things were running up fine as well. Today after a reboot i found the windows starting up with windows classic mode. So now when I am trying to change back it to aero then it is not getting changed. The only thing that is getting changed is the wallpaper and not the theme. The screen is appearing to be stucked in classic mode. I just wanted to know if there is anything I can try out to get aero interface back?? Any help regarding this will be highly appreciated.