If it is on board sound you probably need the M/soft UAA drivers
http://drivers.softpedia.com/get/SOUND-CARD/OTHER-SOUNDCARDS/Microsoft-UAA-Bus-Driver-for-High-Definition-Audio.shtml Go to the above site and download and install them then go to device driver right click sound and upgrade them it will go on net to find and install them
Answers & Comments
If it is on board sound you probably need the M/soft UAA drivers
http://drivers.softpedia.com/get/SOUND-CARD/OTHER-SOUNDCARDS/Microsoft-UAA-Bus-Driver-for-High-Definition-Audio.shtml
Go to the above site and download and install them
then go to device driver right click sound and upgrade them it will go on net to find and install them