Kingsoft Internet Security 9's Antivirus, Firewall, Spyware detection and system tools snap into your Windows Vista or XP system, creating a strong layer of protection for all of your files, the websites you visit and the private information you have on your PC. Kingsoft Internet Security 9's Trusted Authentication Server contains an ever increasing library of information for over 10 million computer files providing real-time safety checking on the files being currently used on your PC and is growing hourly to incorporate information other active protection network users have previously accessed. It is small in size and will not slow your PC down nor require you to have a comprehensive knowledge of the large array of viruses, Trojans and spyware you encounter whilst using your PC day to day. Why choose Kingsoft Internet Security 9? Kingsoft Internet Security 9 is a VB100 and Checkmark accredited security suite tailored to suit heavy Internet use. Multiple scanning engines, Viral signature delivery and realtime file authenticity servers assist in providing a comprehensive level of virus and spyware detection ensuring you are protected against even the latest internet threats.