Then try System Restore, a repair install and finally a clean install.
OK i have windows 7 32-bit Ultimate and im having problem with the boot animation. It doesn't show. the OS boots OK but the animation is the problem. Whenever i boot, I only see a red small screen pixel when the "Windows is Starting" is shown. the animation itself seems to be lagged by something but i don't know. Please help me with this. everything in Win7 works exept this animation. If you need more info just ask me. Thanks!