System Shield 4 AntiVirus and AntiSpyware is a System Utilities software developed by iolo technologies. After our trial and test, the software was found to be official, secure and free. Here is the official description for System Shield 4 AntiVirus and AntiSpyware: Eradicate stubborn PC pests and block future infections with no system slowdown. System Shield provides triple-certified protection while maintaining maximum PC performance, so you can shop, bank, and socialize online without the threat of spyware, viruses, and other threats. you can download System Shield 4 AntiVirus and AntiSpyware free now.