No sound from flash videos is sometimes a very difficult problem and other times it's a very simple problem. In your case, it seems to be very difficult. I was helping another person for two weeks and two hundred posts, but I was still unable to solve his problem. (This is a list of things we tried:
Sound Problems Identical To Murderhewrote ). Then there was another person who I was helping with the no sound from flash videos. He ended up doing a Windows Repair, but that still didn't work.
Maybe someone else can come up with a better idea, but keep in mind that your final option would be to format your hard drive and reinstall windows xp.