Microsoft has released free to download and use Security software. It can protect your system from viruses, spyware, trojans, worms and other malicious stuff. “Microsoft Securty Essentials” software provide basic protection to computer from different online and offline threats.
Download Microsoft Security Essentials
Beta release of the software was only available for download for selected few 1000s users. You can still download and use this software on the computer and stay protected. It is a light weight software that does not put strain on system resources. It can auto update in the background and protect system all the time.
It works fine on Windows XP, Vista and 7 operating system. You can download Microsoft Security Essentials from Softpedia (4.7 MB download file). Please note: it only provide basic security to your computer. If you do not have any security software installed on the computer, its better install this one and stay protected from common malicious threats.