by JDHURF » Wed Dec 26, 2012 7:09 pm
It's not a threat proper, it's just an annoying ad app which is why hitmanpro and kaspersky aren't coming up with anything. From what I gather it usually downloads as bundled software, so there may be more to it than just the browser extension that you disabled. You should be able to easily remove it. Go to the windows start button, then go to control panel, then go to programs, uninstall a program and find yontoo in the list, then just uninstall it. See if that helps.