I have an Acer laptop, Aspire 4930 and it runs on Vista. So here is the problem, I can't hear any sound, not from the pings when a notification is received, when I play videos using a web browser or using a a media player, the videos though are working perfectly. You've probably heard this sort of problem before but what I can't figure out about this one is that iTunes works properly. I've checked the volume mixer and set all of the sliders to max, checked My Computer for any devices with exclamation points or red crosses and the sound still doesn't work. Please help me in any way you guys can, I'm not really good with computer stuff so please, please, please I hope the solution is simple. Oh and one last is that I think I posted here before but I never got around to properly thanking you guys but thank you again for all the great work.