My PC had ATI Mobility Radeon 4500HD, I download the driver from and installed it, but strange problem happened when I wanted to play some games with it.

when the game launcher opened, the graphic card shows GDI Generic, when I clicked at "Detect", it says "Card is not listed, assuming medium settings"

I also checked the update for the driver but it says driver is up to date.
I reinstalled the ATi Graphic Card but it's not solving my problem.

how to solve this?