itunes on windows 7 pc not responding

Hello whitesend3,

It sounds like you are opening iTunes and it is immediately becoming unresponsive. I recommend the troubleshooting in the article named:
iTunes for Windows Vista, Windows 7, or Windows 8: Fix unexpected quits or launch issues

http://support.apple.com/kb/ts1717

Start with this section, and then the additional troubleshooting in the article if you need it:

Start iTunes in Safe Mode

Open iTunes in Safe Mode to isolate any interference from plug-ins or scripts not manufactured by Apple.

1. Hold down Shift–Control while opening iTunes. You should see a dialog that says "iTunes is running in safe mode" before iTunes finishes starting up.
2. Click Continue.
3. See if the issue you're experiencing persists in Safe Mode.

If you have the same issue while iTunes is in Safe Mode, proceed to the "Create a new user account" section. If you don't experience the same issue, follow these steps to remove third-party plug-ins.

Thank you for using Apple Support Communities.

All the very best,

Sterling

My "not responding" issue was sharing oriented. I resolved it by uninstalling Bonjour after the iTunes install. Then reinstalling Bonjour using the MSI after extracting it from the iTunes installer using 7zip. Then I went into Windows firewall and made both instances of Bonjour "Public".