The Youndoo.com badware is a browser hijacker from the Adware/ShortcutHijacker family. It does this by installing random named files and Windows services that check the settings of your browser. When it detects that the home page and search has been changed to a page other than trotux.com, it will automatically change it back. This program is installed via downloaders found on video and file sharing sites. It is important that you pay attention to the license agreements and installation screens.
Source: https://www.bleepingcomputer.com/virus-removal/remove-youndoo.com-browser-hijacker