PUP.Optional.RelevantKnowledge is a Marketscore variant that comes bundled with many freeware utilities. It is considered adware and by some even as spyware. MarketScore, formerly known as Netsetter, uses RelevantKnowledge to gather data about Internet usage. The data is sold for various goals. These include Internet development, commerce, economic analysis, market predictions, and page ranking in search results.
Common infection method
PUP.Optional.RelevantKnowledge is adware that comes bundled with many freeware utilities.
Malwarebytes completely removes this threat. No further clean up is required.