If IE is crashing, it's an add-on. It always is. However, if uninstalling it works for you, then that's a viable resolution, but whatever caused the issue might still be on the box. I usually like to fix things first, then decide whether or not it's worth switching browsers (again - it's not like moving to Firefox or Chrome, or even Opera is a panacea for stability issues, as they all have their own quirks).
Good luck to you though