Note: The average number of updates/day for each antivirus program is shown below. The average number of daily updates was calculated over a 2-3 day period. Generally, the more updates an antivirus program has, the better it is considered to be.

Antivirus Versions Tested: Avast! AntiVirus Pro 6.0, AVG AntiVirus 2011, Avira AntiVir Premium 10.0, BitDefender AntiVirus Pro 2011, eScan AntiVirus 11.0, ESET NOD32 AntiVirus 4.2, F-Secure AntiVirus 2011, G Data AntiVirus 2011, Kaspersky AntiVirus 2011, McAfee AntiVirus Plus 2011, Norton AntiVirus 2011, Panda AntiVirus Pro 2011, Spyware Doctor with AntiVirus 2011, Trend Titanium AntiVirus+ 2011, and Webroot AntiVirus w/Spy Sweeper 2011.

Graph compiled March 3, 2011.