PUP.Optional.Wajam is the detection name for Wajam, a browser add-on marketed as a “social search.”
PUP.Optional.MailRu is the detection for a large family of browser extensions and their installers that are often bundled with applications aimed at the Russian market.
Malwarebytes can remove this potentially unwanted software without further user interaction. Should users wish to keep it, they can add the detections to the exclusions list. Here’s how to do it.