Help protect your PC with Microsoft Security Essentials Microsoft Security Essentials is a new, free consumer anti-malware solution for your computer. It helps protect against viruses, spyware, and other malicious software. It's available as a no-cost download for Windows XP SP2 and higher, Windows Vista, and Windows 7. Download Microsoft Security Essentials Why should I download Microsoft Security Essentials? Comprehensive protection —Microsoft Security Essentials helps defend your computer against spyware, viruses, worms, Trojans, and other malicious software.
Easy to get, easy to use —Because Microsoft Security Essentials is available at no cost, there's no registration process that requires billing or personal information collection. It installs after a quick download and Genuine Windows validation and then stays automatically up-to-date with the latest protection technology and signature updates.
Quiet Protection —Microsoft Security Essentials doesn't get in yo