No, you're fine redlofredlof.
Asus just slapped their name on top of the Realtek Audio Control Panel. If you update your sound card drivers from Realtek's site, the Asus logo will be gone.
The only reason there are two speaker icons in my taskbar is that one is Windows 7's volume control and the other is Realtek's audio manager.
EDIT: You'd think N.A.V. would do a CRC check on the file first before accusing it of being a virus since a
LOT of people with onboard sound have Realtek HD Audio... :/