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Microsoft Security Essentials 4.10.209.0
Provides real-time protection for your home PC that guards against viruses, spyware, and other malicious software. Learn what's new on this latest version. Click here if the download does not begin automatically.
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.
Your PC must run genuine Windows to install Microsoft Security Essentials. MSE requires Windows 7, Windows Vista, or Windows XP. Read more.
Your PC must run genuine Windows to install Microsoft Security Essentials. MSE requires Windows 7, Windows Vista, or Windows XP. Read more.
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