Hi,
If you have also driver then i suggest you uninstalled old driver and restart computer then wait and again start computer and go to my computer- property-hardware-device manager then you see your audio driver yellow mark the click and installed driver. If you have not audio driver then i share a link visit and download. Thanks

Http://download.cnet.com/Realtek-High-Definition-Audio-Codec-Windows-Vista-Windows-7-32-bit/3000-2120_4-10788600.html
http://majorgeeks.com/Realtek_High_Definition_Audio_for_VistaWin_7_d5513.html

http://driverbyte.com/intel-e210882-driver_freedownload/

http://www.softwaredriverdownload.com/intel_e210882_driver.html

http://driverbyte.com/download-intel-e210882-driver_freedownload/

Thanks
Computer Support