Try diabling it in the BIOS.
To activate the BIOS utility, press <F2> during the POST; while the notebook PC
logo is being displayed.
http://www.acerpanam.com/synapse/data/7117/documents/AS%209300_7000%20User%20Manual.pdf
Setting may also be accessible from the eSettings Manager.
http://www.acerpanam.com/synapse/dat...0-%20final.pdf

Or use the device manager to disable sudio card.
Device Manager - Wikipedia, the free encyclopedia
Using Device Manager