Just recently, my computer has been showing this strips of light blue lines scattered evenly all over the screen. When i checked the statue of my graphic card through the device manager, there is a exclamation mark over my Nvidia GEforce 8500GT Graphic card indicating that "this device cannot start (code 10)". I tried troubleshooting, updating driver, unrolling, re installation and even did a visual inspection of my graphic card but nothing reveals any fault. Can someone tell me wats wrong with my computer? Faulty graphic card?