I'm sure one of the helpers here will be able to assist you more than I can but in the meantime I have a few suggestions...
First, it never hurts to scan your machine with more than one type of anti-spyware program. That being said however, you NEVER want to have more than one anit-virus program as then can conflict with each other and leave you unprotected. My suggestion would be since you already have malwarebytes installed, and assuming that its the free version, to open it and click the update tab and verify that you have the latest definitions. Also follow this link and run SuperAntiSpyware. This is their portable edition so it doesn't need to be installed. It runs as a self contained package.SuperAntiSpyware Portable Scanner
You also may want to check your machine for any Rootkits that may be present, my suggestion is TDSSKiller from Kaspersky. You can find it at this link...TdssKiller Kaspersky Support Page
Hope that helps resolve your issue and again I'm sure that the helpers on this site will be able to assist you further. Good Luck.