Internet Explorer closing message?

[Mobius]

This was driving me crazy for awhile so I decided to do the old tried and true test of disabling add-ons. Turns out the culprit was Yahoo Toolbar. No rhyme or reason because it had been working just fine for months. I even tried upgrading one computer from IE10 (Yahoo enhanced) to IE11 (Yahoo enhanced). Had the same issue where the error message would pop up when I tried to click on various items. In one case it was the search window for an online vendor. Hard to believe that there would be an incompatibility issue since I downloaded Yahoo's version of IE. And the problem was the same on two different computers I have. Just a heads up for others out there.
Well, Brendan, I also have Foxfire and Chrome but there are some old apps that require Active-X controls (my security cameras for one) so IE it is.