Make sure to run CCleaner before running Mal ware bytes to considerably speed up the process. Run it in safe mode for both scans. If that doesn't clear things up, go to add/remove programs, sort by date of installation, and Uninstaller anything illegitimate. If you are not sure, then don't uninstall a program. If that still doesn't clear things up, you may need to run combofix, which is a very powerful virus removal tool, but it is risky. Don'the run it if you don't have to. All of the above is free.