Norton Toolbar (Internet Security/Identity Safe) vs. IE11

I've tried to find out why Internet Explorer 11 keeps giving me the following error and have not been able to find a solution, short of changing from IE to a different browser type (which I am unwilling to do).  Is there a "fix" that will enable Norton's Toolbar (Norton Internet Security, Norton Identity Safe, whatever it is--I use both products) to "play nicer" with IE11??  Norton Toolbar IS slow!  From what I can tell, Norton Toolbar DOES slow down the startup of IE11, AND slows down opening new tabs.  Why??  I have 5 days left on my current subscription to NIS and am considering renewing by purchasing the "re-hashing of NIS" called Norton Security.  However, one thing I definitely DO NOT WANT TO SEE, is IE11 telling me how slow Norton Toolbar is!  What I WANT to see, is Norton Toolbar not slowing IE11 down!  Anyway...sorry, I'm just a little frustrated/angry/ticked off about the toolbar issue.  This should not be happening--Norton products are better than that.  (I think.)  Thanks.