|From IE, go to Tools > Internet Options > Advanced tab.|
Under the Browser heading ensure there are check marks in any "Disable script debugging" entry. Also ensure there is no check mark in "Display a notification about every script error".
IE Reset does not revert it to a previous version and sometimes fixes issues (although look at the settings above first).
Security packages protect the whole computer including all alternative browsers.
Can't say I've had much trouble with IE, other than IE8 for XP which was rickety. I'm using IE11 just fine on Windows 7. If you have an earlier version (see Help > About), get the download.
Always pop back and let us know the outcome - thanks