Windows 7: When I install my Graphic drivers my comp stops working??

I've tried installing it from device manager, downloading them and installing of the disc.. My Gcard is a nvidia gts 450. when I install them I restart my comp and after 'Starting windows' it just stays black..

uh?



EDIT: My computer is only about 2 months old.

Edit, my card is a nvidia gts 450.

Cmon someone please..

Help us help you by providing systems specs

Thanks

intel core i5 760 @ 2.80 ghz
4gb ram
windows 7 64 bit professional
gts 450
h55m-usb3 gigabyte motherboard
direct x 11

does the pc power up and what the wattage of the power supply

600W and yes it powers up. I'm online right now with the card disabled in device manager.

Have you installed the latest drivers for your motherboard? If you have the card disabled what are you using to feed video to your monitor?

The white and blue cable that plugs into your Graphics card and monitor (Not sure on the names sorry, VGA/VGI that kind of stuff..) Also my motherboard is up to date as far as I know, and it's just right click disabled in device manager.

Is your monitor connected to the integrated video card (the one built into the motherboard) or the video connector on the GTS 450. To use the add in card you may have to change a bios setting so that windows uses the PCIe Video card and not the onboard. Also you have to move the monitor cable from the motherboard video connector to the connector on the add-in card.