Alright I see....haven't dealt with one of these before
I have looked and looked and looked and looked some more...and I cannot find any updated drivers
for the device. The only thing left to reccomend is these three things...
1)Find the Altec Speakers in Device Manager and right click->Remove the Device. After it finishes, Right-Click any device in Device Manager and hit "Scan for Hardware Changes". It should install the speakers with the default driver again
2)If #1 doesn't work...try a different USB port
3)*if #1 or #2 fail* Contact Altec and see if they can provide a compatibile driver for Windows 7
I wish you the best of luck