Hi,
Here is a link:
https://support.ati.com/ics/support/...asp?deptID=894
You might have already been there; it contains all the downloads you need, and on the left, has options for reading how to install it.
First thing, is to uninstall your old video drivers, and reset computer to VGA Standard.
You must first do that (for most cards and drivers installation) by going to Control Panel, Add/Remove Programs, and Remove the current card's software.
Then, when you re-boot, it will come up into VGA desktop. From there, start you installations.
Best of luck,
fredg