Panda Anti-Virus - A unique, lightweight, and easy to use anti-virus solution from the reputable Panda Security company. If your current anti-virus program is causing your computer's performance to dip, try this for size. Cloud Antivirus works on the concept of "cloud computing" and as such aims to do much of its processing "in the cloud" (that's via remote servers rather than your computer).
A free "uninstaller" program for Windows, specifically designed to help you remove anti-virus software (which can be notorious to delete effectively). AppRemover ensures no files are left cluttering up your PC. If you've purchased a computer with anti-virus tools already installed (i.e. McAfee, Norton, Symantec, Trend Micro) and wish to have them removed, this is ideal.
Download Rising Antivirus Free Edition, an effective anti-virus program designed to protect your computer from viruses, trojans, worms, rootkits and other malicious software. It includes an e-mail monitor (a popular access point for viruses), anti-spyware protection, along with various other features.
This free security tool from Rising is an effective counter to malware - software that can cause harm to your computer. One of its main features is the Vulnerability Scan, which aims to find any security holes in Windows. Additionally, there is a system registry repair tool, spyware scan and removal, and even protection against trojans and other "cyber threats".
Comodo Time Machine is a free download from Comodo that is an effective data recovery utility, allowing you to roll back your computer to an earlier point in time. Comodo Time Machine takes regular snapshots of your system and enables you to recover lost files and settings. It functions on all modern versions of Windows but be aware: they recommend you have at least 4GB free disk space to run Time Machine effectively.
Download this freeware malware remover if you want to keep your computer free from security threats, such as spyware, trojans, worms, etc. There are two main options: Quick Scan (if you're in a hurry) or the more thorough Full Scan. The software is easy-to-use and takes few system resources, so you can even run this on slower machines. Functions on XP, 2000, 2003, Vista and Windows 7.