Among the vendors failing to receive VB100 certification are McAfee, Trend Micro, Sophos, Webroot, Norman, BitDefender and PC Tools.

Some of the biggest names in the anti-virus industry have flunked detection tests for known malware samples on Windows Vista Service Pack 1.

Seventeen of 37 anti-malware products pitted against "in the wild" viruses on the latest version of Vista failed to obtain VB100 certification, an industry benchmark used to rate product quality, according to test results released by Virus Bulletin.

Among the software products failing to nab VB100 certification were McAfee VirusScan Enterprise, Trend Micro Internet Security, Norman Virus Control, Sophos Anti-Virus, Webroot Spy Sweeper with AntiVirus, Alwil Software's Avast, BitDefender Antivirus 2008, PC Tools AntiVirus and VirusBuster Professional.

To gain VB100 from Virus Bulletin's testers, a product must detect 100 percent of malicious Trojans, bots and viruses from a batch of "in the wild" samples maintained in the WildList Organization International's database. The WildList contains a listing of viruses collected and reported by virus hunters during actual computer attacks.

The basic requirements for a VB100 passing grade are that a product detect, both on demand and on access, in its default settings, all malware known to be in the wild at the time of the review, and generate no false positives when scanning a set of clean files.
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