Note that many websites have their own advertising, unrelated to adware.
This adware program has an .EXE and a .DLL file component. The .EXE component looks for certain registry entries and deletes them, while the .DLL component maintains a particular registry entry related to a BHO. Often this product is bundled with more than one adware program.
Reports of Ceres and Nail.exe being bundled and distributed through unlicensed content via BitTorrent. Company denies responsability of distribution and claims this occured through "rogue affiliate distributors".
Look for the file called bi.dll in your windows directory.