Microsoft Security Essentials

Microsoft has released Security Essentials which is its free anti-virus software for your home PCs.

System requirements are:

• Operating System: Genuine Windows XP (Service Pack 2 or Service Pack 3); Windows Vista (Gold, Service Pack 1, or Service Pack 2); Windows 7
• For Windows XP, a PC with a CPU clock speed of 500 MHz or higher, and 1 GB RAM or higher.
• For Windows Vista and Windows 7, a PC with a CPU clock speed of 1.0 GHz or higher, and 1 GB RAM or higher. VGA display of 800 × 600 or higher.
• 140 MB of available hard disk space.
• An Internet connection is required for installation and to download the latest virus and spyware definitions for Microsoft Security Essentials.
• Internet Browser: Windows Internet Explorer 6.0 or later.Mozilla Firefox 2.0 or later.
• Microsoft Security Essentials also supports Windows XP Mode in Windows 7.

Can be downloaded at http://www.microsoft.com/security_essentials/