virus 

VirusBuster Virus Database 10.113.4 [01.11.2009] provides you with a really useful database which will update your antivirus with the latest virus signatures to keep it in top notch shape. You can easily update your Virus Database by launching the following batch file after you unzip the archive: Update.bat.

ClamWin Virus Databases 14 October 2009 is designed with the ability to update Virus Database for your ClamWin antivirus. ClamWin shares the virus database with ClamAV and it is updated several times a day. All new viruses are promptly added to the database. Although the total number of viruses may seem less than other commercial Antivirus vendors claim to have but if ClamAV database misses some viruses then these will be ancient species.

Kaspersky Anti-Virus Update December 14, 2009 provides users with a special update application to install the latest virus databases and various fixes to AntiViral Toolkit Pro for Windows 95/98/NT version 3.0.129 and above. Use this if you already have AntiViral Toolkit Pro installed. The antivirus databases currently contain 2338308 records. Requirements: Windows

Upgrades the Protector Plus antivirus software Virus Database

Trend Micro Pattern File contains Virus Pattern Files with latest virus databases

Latest free virus definitons for AVG AntiVirus

Contains the latest free virus definitions for F-Secure Antivirus