[Hellfighter]

geforce 7800
who made the card MFG? is it XFX or some other company?

you may have to update the bois and chipset for the mother broad so it knows how to work with it

when every you added in a new video card to the system always unstill the video software that is already in still or the system will never know what the video card is.

look in add & remove for all video software that is instill unstill them then add-in the new hardware to the system.

i bet you never unstill the Graphic software before you added in the video card.

step
1.) unstill any graphic drivers & software (MOB pre-instill))
2.) close down the system.
3.) add-in new video card (at this time only)
4.) bootup the system.
5.) system found a new hardware. don't let it instill the software or drivers X-out.
6.) you instill the new updated drivers and software (best you do it)
7.) restart system.
8.) happy gaming time now.

best disable system restore reboot system. reason if some fool use it it will remove all you done and talk about a big trouble. disable it restart system then enable it.

your MOB drivers and software for the video chip is still in the system remove it by unstill it.