Protect your PC

Get Microsoft Security Essentials for the low, low price of free

Microsoft Security Essentials is supported on Windows 7 and Windows Vista.

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Get Microsoft Security Essentials

Microsoft Security Essentials

Use Microsoft Security Essentials to help guard against viruses, spyware, and other malicious software. It provides real-time protection for your home or small business PCs.

Microsoft Security Essentials is free* and we designed it to be simple to install and easy to use. It runs quietly and efficiently in the background so you don't have to worry about interruptions or making updates.

Key Features

Comprehensive malware protection
Supports Windows 7 and Windows Vista
Available in 33 languages
Simple, free* download
Protects you quietly in the background
Automatic updates

Need security for your business?

Microsoft Security Essentials is available for small businesses with up to 10 PCs. If your business has more than 10 PCs, you can help protect them with Microsoft System Center 2012 Endpoint Protection deployed and managed through Microsoft System Center 2012 R2 Configuration Manager.

New PCs for you

See how you can get things done and have more fun with a Windows 8.1 laptop, tablet, 2-in-1, or desktop.

Explore new PCs

A tablet, a laptop, and an all-in-one running Windows 8.1

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Get more information on Microsoft Security Essentials.

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