ok so i was installing BitDefender and for some reason my computer was running really slow while installing and it just froze all of the sudden. i tried command prompt but it just didn't work, so i just pressed the little restart button and it restarted. when it restarted the intel logo screen came up, then the windows loading screen came up. but when it hit the login screen the screen just went black like if was off but the little light that shows power in the screen was on. then i just pressed enter and i could hear the windows sound the one you can hear when you are entering. i could hear everything running perfectly even msn but my screen just wouldn't show up. i found out that if i unplugged my computer for about 10 minutes it would actually turn on and work perfect, so from there i can tell that is not a hardware problem but something with software. then i restarted the computer to see anything had happened but the problem came up again. i did that little solution thing and unistalled my graphic cards' drivers, after that i restarted the pc and the black screen just dissapeared. but the resolution was just horrible, i decided to install the drivers agai(i downloaded them off the official web site which is http://www.nvidia.com/) and the problem came up again. before this problem i could play video games like half life 2, but now when i try the screen will just go black please someone help me fix this !!!!!!!!