iTunes says I need to enable Bonjour but my PC says it's working

I am trying to stream videos to my Apple TV. However, Home sharing is not working. iTunes asks me to turn on the bonjour service. Yet, when I go into my PC settings it tells me that bonjour is installed properly and working. For some reason iTunes does not pick it up.

I have disabled all my firewall settings and antivirus settings. I am beyond frustrated because I can't figure out how to get home sharing to work. Please help!!

I am on Windows 7. I have uninstalled and reinstalled iTunes several times but it hasn't solved the problem.

PLEASE HELP!!!!