Baidu Antivirus is a free lightweight antivirus for your computer which is built by Baidu which is the one of popular search engines. It offers protection layers in multiple ways to take care of user data. Just to protect users, it uses its three antivirus engines that are Baidu Antivirus Engine, Baidu Cloud Engine, and a fully integrated antivirus engine from Avira. This way it offers extra protection in a unique and combined way than other antivirus does.