Since it is free software, the installer may sometimes bundle third-party offers. Always choose "Custom Installation" and decline any additional software you don't need.
(sample) This paper examines Format Factory version 4.3.0, a freemium multimedia conversion utility. We evaluate its codec support, conversion speed, output quality, user interface efficiency, and potential security/privacy risks, including bundled adware behavior reported in earlier versions. format factory 4.3.0