To quote Nasty:
When I have problems like this I run three apps:
Smitfraudfix, Combofix and Malwarebytes. Be sure you run them in that order in safe mode with networking and I think it will flush your system of wee beasties.http://siri.geekstogo.com/SmitfraudFix.phphttp://www.bleepingcomputer.com/downloa
Be sure to download them in safe mode. The only one that installs is Malwarebytes....install it, update it and run it, get the free version of Malwarebytes....it works just fine. The rest are free, if you feel like donating to help the first two, please do. All these apps take time to run, be patient and let them do their magic.