BullGuard Limited, founded in 2001 by Morten Lund and Theis Søndergaard, is an Internet security company, that creates antivirus and antispyware applications for PCs and mobile phones. Headquartered in London, UK, BullGuard has operations in more than six countries.The first version of BullGuard was released in June 2002. By early 2003 more than 3 million users had installed BullGuard. By 2006 this had risen to more than 16 million downloads and the company had products for desktop PCs, mobiles and P2P networking, such as Kazaa. BullGuard uses the BitDefender anti-virus engine.