Alerts notify you when spyware, viruses, or other malicious software attempt to run or install on your PC, and suspicious files and programs are prevented from opening. Real-time protection means addressing potential threats before they become problems.

Microsoft Security Essentials is built for individuals and small businesses, but it's based on the same technology that Microsoft uses to protect giant businesses (security products like Microsoft Forefront, the Malicious Software Removal Tool, and Windows Defender). Microsoft Security Essentials offers award-winning protection against these intruders without getting in your way. There are a host of nasty intruders on the Internet including viruses, trojans, worms and spyware. MSE requires Windows 7, Windows Vista, or Windows XP. Your PC must run genuine Windows to install Microsoft Security Essentials. It's easy to tell if your PC is secure - when you're green, you're good. 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.

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