my laptop (lenovo g50 running windows 10) has been infected with a browser hijack. Chrome redirects to default-search.net. The computer is also running super slow. I tried to remove it myself, but I can't seem to find the sucker. Linkey / setting manager aren't showing up in the control panel. I've run BitDefender, Avast, Malwarebytes, and nothing works. Any help would be greatly appreciated!