Stfngdvw Toolbar is a corrupt Browser Helper Object (BHO) and, apparently, a clone of the infamous zlob.toolbar. This parasite has the primary function to promote various programs and services of dubious nature, most notably - rogue anti-spyware programs. Stfngdvw Toolbar might  redirect the browser to unsolicited websites. None of the things advertised by Stfngdvw Toolbar ... (via)