It runs on Windows XP, Windows Vista and Windows 7, but not on Windows 8. Microsoft Security Essentials provides real-time protection for your home PC that guards against viruses, spyware, and other malicious software. Microsoft Security Essentials is a free download from Microsoft that is simple to install, easy to use, and always kept up to date so you can be assured your PC is protected by the latest technology. It's easy to tell if your PC is secure - when you're green, you're good. It's that simple.
Operating System Requirement
Windows 7 (32- and 64-bit)
Windows XP SP2 or SP3 or higher (32-bit)
Windows Vista SP1 or SP2 (32- and 64-bit)
To Download MSE Antivirus CLICK HERE
System memory
Windows 7 and Windows Vista: 1GB RAM
Windows XP: 256 MB RAM
Free hard drive space
140 MB of available hard disk space.
Video resolution
VGA display of 800 × 600 or higher.