RE: IE 11 still installed under Win10.
I use an old tabbed IE-based browser because of some editing add-ons that are not longer available and have no comparable modern versions.
Last year, MS updates (which I have turned off) installed IE 10. The old browser would no longer work. I did manage to ‘uninstall’ it and return to IE9. My old tabbed browser works again.
I’m curious which add-ons do you use?