I have an Asus M4A785TD-M EVO motherboard which has integrated ATi HD 4200 graphics. In order to get better graphics performance when running Adobe LightRoom and Photoshop under Win 7 (64 bit) I added an ATi HD 5570 graphics card (manufactured by XFX). Windows reports a Code 43 error against the HD 4200 hardware, implying that no driver is installed. I want to correct this error. It is easy to locate and download the latest catalyst drivers for both the 4200 and the 5570 hardware (they are different), but I cannot understand how both sets of drivers can be installed concurrently - surely the files names for various software components are the same, so I either end up with support for the 4200 installed or the 5570, but not both - don't I? Or is there some work around?