Just bought 1st VAIO (VGN-SZ4MN).Vista Business was already installed but I greedily upgraded to ultimate with windows anytime upgrade disc provided... I appear to have lost any sound capability. "No audio device installed". My sound card is a Sigmatel high def audio CODEC.Hugely frustrating as am away and can't Skype family, watch DVD, use media centre etc. Please help if you've any ideas on resolving the issue...
