PUP stands for Potentially Unwanted Program, this is a virus.

What does PUP optional mean?

Short bio. PUP. (Optional) is a category of Malwarebytes detections that applies to potentially unwanted programs (PUPs).

What is PUP used for?

A potentially unwanted program (PUP) or potentially unwanted application (PUA) is software that a user may perceive as unwanted or unnecessary. It is used as a subjective tagging criterion by security and parental control products.