No Audio

I installed the latest Flash Player and now I have no audio on any internet video. I uninstalled with no change, so I reinstalled it. I tested it with the sound mixer and it's not my system.  I'm running Windows 7 / 64 bit and tried Explorer, Chrome, & Firefox. It's not the volume I've got it turned up to the max. I hope some Wiz can give me a simple answer. Please show me how stupid I am.