My daughter has a Sony Vaio laptop and we experience intermittent sound problems. When the laptop starts up we hear the Windows Vista welcome tone but then when we go to AOL or itunes there is no sound. I've checked the volume controls and they seem fine, I've gone to the control panel and checked the sound drivers but they don't have a 'warning' signal on them and I've also searched for the latest driver but this seems to be the latest.
I may have missed something obvious. Any thoughts would be much appreciated.