I followed article TS3219 iTunes: May become unresponsive when connecting iPhone, iPad, or iPod touch, but…

I have reached the point where it does not occur when I am another user, but it does occur when I create a new library, and the support article does not cover this....?

I now need further support to understand how to cledan out i`Tunes completely for me as a user so I can use it like {fake me} the alternate user I created to test iTunes screw-up