Download antivirus for free, as well as other free AVG products, join the millions of home users that trust AVG to protect their computers. The AVG Anti-Virus software comprises a resident program that works in the background, an email scanner, an on-demand scanner, the ability to repair certain infected files, and automatic updates of the virus definitions. A more fully featured commercial version, AVG Anti-Malware is also available. The commercial version protects against viruses, spyware and other malware.

avast! 4 Home Edition is a full-featured antivirus package designed exclusively for home users and non-commercial use.

PC Tools AntiVirus Free Edition provides world-leading protection against viruses, worms and Trojans with rapid updates and IntelliGuard real-time technology.

AntiVir Personal Edition is a free antivirus program for Windows computers. It has a resident component that monitors file movements for signs of viruses. It also allows you to scan your computer and repair files that have been infected. The program comes with a facility to automatically check the AntiVir website for updates to the virus definitions and download them. Well suited for Windows XP, 2000. It detects over 250000 viruses. Updates are free.

Comodo Antivirus provides real-time scanning, where it resides in memory and checks your programs for viruses as they are run, as well as on-demand scanning for viruses. You can also schedule your scans. It automatically updates itself through the internet. This is a Windows program.

Trend Micro™ HouseCall is an application for checking whether your computer has been infected by viruses, spyware, or other malware. HouseCall performs additional security checks to identify and fix vulnerabilities to prevent reinfection.

Scan your PC for free. BitDefender Online Scanner is an on-demand virus scanner which incorporates the award-winning BitDefender scanning engines. You can use it to scan your system's memory, all files and drives' boot sectors, and to automatically clean infected files. Requires Internet Explorer 4+ or higher for the Online Scanner to work.

Kaspersky Lab's free virus scan provides a free online scan of your computer for spyware and viruses. The Online Virus Scanner uses Microsoft ActiveX technologies to scan your computer for malware.

McAfee FreeScan helps you detect thousands of viruses on your computer. Based on the award-winning McAfee VirusScan engine, FreeScan searches for viruses, including the latest known "in the wild" viruses, and displays a detailed list of any infected files. Should viruses be found, FreeScan even provides links to more information about the viruses and what you can do to clean your system.

Free online antivirus. Panda ActiveScan. Disinfect your PC from viruses, Trojans and worms.

F-Secure Online Virus Scanner is a free service. Use it to find out if your computer is infected and disinfect your computer if needed. Use with Windows 2000 and XP only.