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Spybot - Search & Destroy can detect and remove a multitude of adware files and modules from your computer.

This tool checks your computer for infection by specific, prevalent malicious software (including Blaster, Sasser, and Mydoom) and helps to remove the infection if it is found. (* See site for all details.)

With the wide variety of viruses, hackers and blended threats lurking on the Internet today, you need more than a simple anti-virus program to keep your PC and files secure. McAfee® VirusScan® Plus AntiVirus, Firewall & AntiSpyware provides the essential protection you need to surf the Web and download files safely. Get it free now!

This tool checks your computer for infection by specific, prevalent malicious software (including Blaster, Sasser, and Mydoom) and helps to remove the infection if it is found. (* See site for all details.)

An excellent program that's perfect for guarding your computer against viruses and other harmful files that can be acquired from removable disks or via the Internet. AVG is very complete for a freeware program and additionally to the "Resident Shield", which offers real-time virus protection, AVG also provides an e-mail mailbox scanner and a task/update scheduler. Free and regular virus definition updates are provided.

This version of Avira AntiVir is one of the best freeware anti-virus programs we've seen and offers effective protection against almost all computer viruses on the stand alone PC. This version detects over 50,000 different types of virus (macro, etc.), and can scan or repair viruses quickly. AntiVir is made in Germany and is freely available to people using it non-commercially. They provide free and regular updates.

Here's a free anti-virus program, ideal for protecting your PC from viruses, spyware and various other rogue files. Active Virus Shield, once loaded, constantly monitors your computer for viruses and checks for updates every hour to ensure adequate protection. The program is very easy to use and functions on Windows 98, 2000, ME and XP. (A release for Windows Vista is in the pipeline and will be available shortly).

This program is an intelligent freeware anti-virus tool, providing lots of useful features, such as entire system scanning, "on demand" file scanning (e.g. scanning one particular file), the ability to isolate dubious files in "quarantine", live updates to keep your system secure, a task scheduler and an interface that can be "skinned". BitDefender can also be easily configured to output reports on your system scanning activities.