Hi,
You may have sound issues with SP3 installed prior to having all your hardware working correctly. SP3 comes with a UAA driver needed for High Definition Audio, but it can cause conflicts.
If your sound still does not work you may have to remove SP3 and the UAA driver and install SP2, UAA Driver, Sound driver (in that order).
UAA driver can be found here:
http://drivers.softpedia.com/get/SOU...on-Audio.shtml
What is the exact model of your friends ADVENT?
Bill