ATI 7 series VGA driver doesnt install

[kardon]

Hi, My problem here is ,that i installed Windows 7 on my PC which has Vista previously,now after instaling windows 7 i m able to install all drivers but the ATI 7 series VGA driver which says can only be installed on Vista or XP.
now my question is wat shud i do to install that on Windows 7 , is there anyway i can install it or any other alternative? how does the PC perform without the VGA driver? and can i get the drivers on the internet ! pls help me here !

 

[Wishmaster]

(EDIT)

You can let MS update try to download and install a suitable driver OR

Try setting the installer to run in compatability Mode. Vista SP1 and run as Administrator.