Wikipedia
OpenCandy was an Adware module classified as malware by many anti-virus vendors. They flag OpenCandy due to its undesirable side-effects. It is designed to be installed on a personal computer during installation of other desired software. Produced by SweetLabs, it consists of a Microsoft Windows library incorporated in a Windows Installer. When a user installs an application that has bundled the OpenCandy library, an option appears to install software it recommends based on a scan of the user's system and geolocation. Both the option and offers it generates are selected by default if the user simply clicks "Next" through the installation.
OpenCandy's various undesirable side-effects include changing the user's homepage, desktop background or search provider, and inserting unwanted toolbars, plug-ins and extension add-ons in the browser. It also collects and transmits various information about the user and their surfing habits to third parties without notification or consent.
OpenCandy was shut down in June, 2016.