I have win 7 64 and IE and firefox installed. I mainly use IE.
Yesterday, IE stopped playing audio on youtube. I think it was after I updated flash player in response to a message on firefox.
I have no sound on youtube on IE. But sound works on youtube on firefox.
I have done several uninstalls and reinstalls and on the last, flash player appears on add-ons enabled in IE settings. The installation passed the tests on adobe's website.
I updated it last week and removed old versions using the removal tool
In fact I just removed and reinstalled version 188.8.131.52
On youtube there is no volume icon and no sound.
The adobe object shows up enabled in IE add-ons