Ok, Well I have did what you said. removed all the display drivers. turned PC off. Inserted my 8800GT and then when I started the PC up I still had weird lines. (I have took a picture) I ignored them and installed the driver which is on the CD i got with the card. It then said it failed for some reason I could not read it properly. I cheacked My Computer > Properties > Hardware > Devices and under display it had NVIDIA 8800GT with a ! in a yellow circle. I rebooted and still no luck. I went to Nvidia website and downloaded the latest driver and rebooted still no luck. then my pc kept on restarting itself.