PUP.Optional.Wajam is the detection name for Wajam, a browser add-on marketed as a “social search.”
PUP.Optional.CrossBrowse is a Potentially Unwanted Program (PUP) that’s a member of the Crossrider family. Crossrider offers a highly configurable method for its clients to monetize their software. The common method to infect users is software bundlers. The CrossBrowse members of this family install Chromium build browsers to replace the user’s own browser, sometimes combined with extensions for Firefox and Internet Explorer. The overall goal of this PUP is to increase the amount of advertisement impressions shown to the user.
PUP.Optional.CrossBrowse installs are typically triggered by bundlers that offer software you might be interested in, combined with adware or other monetizing methods.
Malwarebytes completely removes this threat, unless specified explicitly in a dedicated removal guide.