Unable to install integrated graphics driver for optiplex 990 sff

Hi,

I am trying to install the driver for the intel 2000 HD integrated video card, however  gives the message ' this computer does not meet the minimum requirements... ' and fails to complete . Cannot install the drivers manually as the card does not appear under device manager. I have a ATI Radeon 6350 installed and the bios version is A13 with multi display support enabled.

Any help would be appreciated, thanks in advance.