I have no sound. i downloaded this driver that the mst person told me to http://www.realtek.com/downloads/downloadsView.aspx?Langid=1&PNid=24&PFid=24&Level=4&Conn=3&DownTypeID=3&GetDown=false and after installing that there is a x on my speaker and when i click the speaker it detects problem and says "hardware changes may not been detected" and i did restart the computer many of times. help?

Computers & Internet - Mach Speed - (MSNV-939) Motherboard