Norton Search Provider keeps disappearing

Using Norton 360 on a Windows 7 OS and using Microsoft IE (latest).  Norton Safe Search keeps disappearing from my IE Search Provider Add-on List.  It is being replaced by Bing which removes Norton as default search provider and sets Bing as default ... even when I have selected to "Prevent programs from suggesting changes to my default search provider".  When I become aware of this I remove Bing from the list, but Norton does not reappear.  I have tried everything that I know of, but I can not stop this Bing PUP from exploiting my browser.  Someone out there MUST know what is going on.  This seems like a case for an Anti-Trust lawsuit to me ...

 

- Art