Problem: after installing drivers there is still unknown device in device list.
Solution: 1. Disable AMD Live! feature in BIOS.
2. Download AMD Live! patch from Asus site (Utilities part of downloads section)
Seems like Asus away feature (been used in most of Asus motherboards) have problem with AMD Live!. Simply installing driver for Asus ASPI BK0001 device is not enough. You need patch to fix this (if you want this feature) or just disable it in BIOS.