yup, it has the option to use 2.1 all the way to 7.1
I too am having the same problem, my guess si you're using the realtek audio ports?.
I hear people either
A) upgrading their audio cable such as rca or optical,
B) upgrading their sound cards.
I've been staying up late for the past 2 nights googling the hell out of this topic to get a straight answered even asked windows support and they don't know anything but the basics unless you pay for their support....
From what i understand is Win XP doesn't have this problem but mainly vista and 7...
If you find anything let me know please!
And ill do the same!.