Problem switching between audio devices

I have recently installed windows 7 on my pc and since then have been having problems switching between audio devices. When I go into my control panel under manage audio devices it says both my speakers and headphones are working and detect no problems. When I run Itunes/Teamspeak etc. the sound comes out of my speakers as normal, I then plug in my headphones and it switches to them but when I unplug them it is causing the program to output no sound; Itunes auto pauses and will not resume manually and Teamspeak doesn't allow me to use my push to talk button. Any help or advice would be greatly appreciated as it is a pain in the a** having to re run programs for the sound to resume!

 

I don't have any experience with Windows 7 or Teamspeak, but I suspect that the problem could simply be with iTunes
and not Win 7, other software or your hardware.

Try doing some similar processes without running iTunes at all.