The plug-ins are in the iTunes folder and this is the sequence for finding them.
If iTunes runs without any issues in safe mode, then the problem is with the third party plug-ins and you will have to isolate them one by one so as to identify the faulty ones.Any visual plug-ins that you have installed will be disabled in safe mode and you should click Continue to allow the app to continue with those add-ons disabled.Press the Command and Option keys when launching iTunes so as to start it in safe mode.Third-party plug-ins could also be the reason why iTunes is not responding on Windows 10 and here is how to deal with this challenge.