Exactly the same problem for me. As my Virgin F.secure subscription is coming to an end I today installed Avast 2015.10.02208 on my Windows 64bit pc and laptop, both running Internet Explorer 11 version 11.0.9600.17420.

On both machines Internet Explorer keeps crashing whereas Chrome works fine.

If I disable the Avast add-on Internet Explorer then works normally.

Looks like it’s going to be AVG free for me instead.