Now you can use your PC more safely. With Microsoft® Security Essentials, it’s easy to help protect your 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. Microsoft Security Essentials is available at no charge for customers who are verified to have a copy of genuine Windows in select countries. No registration or personal information is required, only automatic verification of your genuine Windows installation.
Microsoft Security Essentials is a FREE* download from Microsoft that is simple to install, easy to use, and always kept up to date so you can be assured your PC is protected by the latest technology. It’s easy to tell if your PC is secure — when you’re green, you’re good. It’s that simple. Microsoft Security Essentials runs quietly and efficiently in the background so that you are free to use your Windows-based PC the way you want — without interruptions or long computer wait times.