Enhance your war on Spyware and Viruses.
Now available for download, Microsoft Security Essentials (MSE) is a comprehensive Antivirus and Antispyware solution to keeping your PC safe from attacks.
This free application replaces Windows Defender and is a strong competitor for current antivirus applications. It has been in Beta release since June and has received mostly positive reviews.
If you are looking for a free solution to combat both Spyware and Viruses, consider this Microsoft offering. It is highly recommended.