Started having a little issue after installation. The card works fine and the driver installed fine, but each time I reboot, it keeps detecting new hardware. I just cancel out and everything still works, just wondering what can be causing this. This is what the Device Manager looks like after reboot.....
I have had this question myself. It turns out the unknown mystery device is the ATI Unified AVstream Driver, and the latest full Catalyst update should contain drivers, mine did.
It is a WDM driver, so after selecting the folder with your version of windows and making sure to choose the WDM drivers, then search out the corresponding AVS folder for your installation and the drivers should be inside.
I didn't have to download any different software or catalysts.