I've been complaining in this thread
that since the screwed-up Microsoft upgrade to Win10 my IE11 is significantly slower to open and worse still 50% of the time there's no Norton Toolbar, even though it's checked in Tools and it's enabled in the list of Add-ons.
In case this is happening to you, here's what Aaron Pav suggested:
"in IE Internet Options - Security tab, turn off "Enable Protected mode" and restart IE. Go back to Internet Options, re-enable Protected mode and restart."
It worked for me but with all things concerning the screwed-up Upgrade it could be entirely different when I next power-up.
But it's clear to me that Microsoft is going all it can to get users to move to Edge.