Did you know that as a home user or a small business with up to ten PCs, free antivirus is available from Microsoft to help protect your Windows investment?
Microsoft Security Essentials provides real-time protection that guards against viruses, spyware and other malicious software. It's simple to install, easy to use and always kept up to date to ensure that a PC is protected by the latest technology.
Minimum system requirement for Microsoft Security Essentials with regards to the operating system is (genuine) Windows XP (Service Pack 2 or Service Pack 3,) Windows Vista (Gold, Service Pack 1, or Service Pack 2) or Windows 7
No catch, get it now from the Microsoft Security Essentials website.