Microsoft Security Essentials is free anti-virus software that helps defend your computer against spyware, viruses, worms, Trojans, and other malicious software. Because Microsoft Security Essentials is available at no cost, there's no registration process that requires billing or personal information collection. It installs after a quick download and Genuine Windows validation and then stays automatically up-to-date with the latest protection technology and signature updates. It runs quietly in the background and schedules a scan when your computer is most likely idle. You only see alerts when you need to take action.
Visit http://www.microsoft.com/security/pc-security/mse.aspx for installation instructions and system requirements.
Download Microsoft Security Essentials @ microsoft.com
AVG Anti-Virus comes in three versions: AVG Anti-Virus Free, AVG Anti-Virus, and AVG Internet Security.
AVG Anti-Virus Free is free anti-virus protection software! It's perfect if you use your PC for casual surfing, searching or social networking. The free version includes LiveScanner®, which checks web pages before you visit them and shows a safety rating for that site. It also blocks common viruses and spyware.
AVG Anti-Virus includes the same features as AVG Anti-Virus Free and also includes AVG Online Shield™ for Downloading and AVG Online Shield™ for Chatting. AVG Online Shield for Downloading checks files before you download them to make sure they are safe. AVG Online Shield for Chatting secures online chat links. Free technical support is also also included with this version, which is great for support and assistance.
AVG Internet Security includes the features from AVG Anti-Virus Free and AVG Anti-Virus and adds AVG Firewall, AVG Anti-Spam, AGV Identity Protection™, and Wireless Network Intrusion Detection. AVG Firewall keeps hackers out of your home network. AVG Anti-Spam blocks potential spammers and scammers. AVG Identity Protection protects your identity by recognizing malicious software; and Wireless Network Intrusion Detection protects you from remote attacks when you are connected to WiFi networks.
Visit http://free.avg.com/ for pricing and system requirements and additional details.
Download AVG Anti-Virus @ avg.com