Qword search engine / Versalsoft internet download virus

Original problem: Internet Explorer is currently running with disabled add-ons.
manage add-ons” it’s showing that they are all enabled. And Yahoo Toolbar keeps disappearing no matter no many time its uninstall and reinstall.
Malwarebytes seems detecting Virus there and removed them accordingly.
And this Qword search engine keep default itself as main search engine.
Also Versalsoft internet downloader default itself as main downloader program.
Have combofix removed Qword regenerator, then regedit all of the qword / versalsoft reference out from registry, then system restore back to month ago point to totally remove this qword search.