Dennis Technology Labs is an independent software testing firm. They compared corporate AV products with real-world simulated testing as noted in the comprehensive PDF report
Product Protected Legitimate accuracy Total Accuracy Kaspersky Endpoint Security for Windows 100 100% 100% Symantec Endpoint Protection 100 100% 100% Trend Micro OfficeScan and Intrusion Defense Firewall 95 95% 93% McAfee VirusScan, HIPs and SiteAdvisor 98 87% 88% Microsoft System Center Endpoint Protection 53 100% 64%
This report aims to compare the effectiveness of anti-malware products provided by well-known security companies. The products were exposed to internet threats that were live during the test period. This exposure was carried out in a realistic way, closely reflecting a customer’s experience. These results reflect what would have happened if a user was using one of the products and visited an infected website