Free Antivirus
Now you can work—and play—on your PC more safely. With Microsoft® Security Essentials, it’s easy to help protect your home or small business PC from viruses, spyware, and other malicious software for FREE* with the same award-winning technology used by millions of consumer and enterprise PCs around the world.
* Your PC must run genuine Windows to install Microsoft Security Essentials. Internet access fees may apply while downloading.