765. Hello. Hello. You can't hear me and I can't hear you.

Today I used Teamviewer for the first time to allow a friend to show me how to do something on my computer. It allows a user to remotely control your system.  Control was fine, but we couldn't converse via voice. This was my first use of a microphone on this PC, so I automatically blamed it on incompatibility. However, I found an option to ALLOW or NOT ALLOW camera and microphone in Flash player. I had it off. Maybe next time the Teamviewer software will be allowed to use them.