Adware:Adware (or spyware) is a small program that is designed to show advertisements (in various form and degrees of intrusiveness) on your computer. It often reports personal information back to its owners. As a result your sense of privacy can be violated.
DelFin Media Viewer is a media player that delivers online animated advertising similar to television commercials. Advertising such as movie trailers, game previews, and promotional messages are displayed while your dial-up modem connects to the Internet. DelFin Media Viewer may come bundled with other adware, and has been reported to generate pop-up and pop-under advertisements.
www.DelfinProject.com
Technical details (How to remove DelFinMediaViewer(pop up))