@jonathan
Here is an article giving information about OpenCandy. http://www.bleepingcomputer.com/forums/t/504224/pup-issues-malwarebytes-anti-malware/

It’s not a virus or malware. It’s sort of a “plugin” which, during the installation of a program, may ask if you want to download another software package. If you are not interested in the other program, just deselect the check box.

BTW, my understanding is that “Win32:Malware-gen” is heuristic.