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For a PC running an older version of Windows, you can download Microsoft Security Essentials.

Windows Defender for Windows 8 and Windows RT provides built-in protection against malware. You can't use Microsoft Security Essentials with Windows 8, but you don't need to — Windows Defender is already included and ready to go. But if you’re looking to protect a PC with an older version of Windows, you can use Microsoft Security Essentials to help guard against viruses, spyware, and other malicious software.

Microsoft Security Essentials is available in many locales and languages. If it is not available in your preferred language, you can install it in any of the other languages listed here, and it will still work to help protect your PC. To download Microsoft Security Essentials, choose your preferred locale or language from the list that follows. Next, choose your operating system to begin the download process.

Microsoft Security Essentials System requirements

If you need help finding which version of Windows you're running, see Is my PC running the 32-bit or 64-bit version of Windows?

• * Internet access fees may apply while downloading. Your PC must run genuine Windows to install Microsoft Security Essentials.  |  Microsoft Security Essentials Privacy Statement |  Microsoft Security Essentials License Agreement

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www.microsoft.com