Microsoft’s free antivirus software, Microsoft Security Essentials (MSE) has already been released. Built on the same award-winning core security technology found in the company’s businesses security solutions, MSE give real-time protection against viruses, spyware and other malicious software.

According to a recent report by Websense Security Lab, Malware authors have used Search Engine Optimization (SEO) poisoning techniques to redirects search results related to Microsoft Security Essentials to web sites that serve rogue AV (details here)