Many props to
Birdynumnum.
I searched high and low for a solution to this, many uninstalls and reinstalls and deleting and blah blah blah. Finally found this post, and YES it was exactly what I needed. I'm going to add a few phrases to help other people find this. It is just plain dumb that reinstalling IE and Flash did not fix this issue.
no sound in IE
no sound in internet explorer
no sound in browser
music plays but websites don't
ie won't play sound
ie can't play sound
internet explorer won't play sound
hope those can help some future googler.
THANK YOU VERY MUCH
Birdynumnum
Oh, go to the very first post and follow his instructions to copy all that text into a file, and name it missing.reg, and run it.