Why does IE decide to randomly open 50 new tabs of the last page I was on?

It’s in the region of 50 every time. It keeps going until my Menu toolbar disappears and the page wont load at all. After it’s done and I close all the tabs, I have to re-start my computer before I can open multiple tabs again. It happens about once, sometimes twice a day depending on internet usage. I’m up to 2 as of 4.15pm today.

Please help me out.