|a little better info would help. You say you have sound when not online and non when you are online. What exactly do you mean?|
You mean a CD plays but when you try to watch an online vid there is no sound?
Brand name & model number will help. At least we can google the specs then.
Did you EVER have sound on the internet as you say?
If so, have you tried a system restore back to when it worked? There are many options but we know absolutely NOTHING about your PC.
Some HELP in posting on Computing.net plus free progs and instructions Cheers