When all else has failed (and I think Malwarebytes is a great product), I use the Kaspersky Rescue Disk 10. It is quite an amazing product, and it's free to download.

You have to burn the ISO to a disc, and then boot from that disk. Run it from the GUI option. And make sure your 'puter is attached to an internet connection for updates that it requires.

It may take a while to run depending on your setup, but I've found it to be OUTSTANDING in finding things that everything else has missed.

Good luck.

http://support.kaspersky.com/faq/?qid=208282173