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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.
Microsoft Security Essentials provides real-time protection for your home or small business PC that guards against viruses, spyware, and other malicious software.
Before you install Windows 11, it’s a good idea to save any work and back up your PC before you start. If you used the Media Creation Tool to download an ISO file for Windows 11, remember to burn it to a DVD before following these steps: Attach the USB flash drive or insert the DVD on the PC where you want to install Windows 11. Restart your PC.
Microsoft Security Essentials est disponible en téléchargement gratuit* chez Microsoft. Cette solution est facile à installer, à utiliser et à mettre à jour afin que vous soyez assurés que votre ordinateur est protégé par la dernière technologie.
Download the Microsoft Security Essentials virus and spyware definition update file that is appropriate for your version of Windows: Download the file for a 32-bit (x86-based) version of Windows. Download the file for a 64-bit version of Windows.
The official Microsoft Download Center. Featuring the latest software updates and drivers for Windows, Office, Xbox and more. Operating systems include Windows, Mac, Linux, iOS, and Android.
Downloading and installing Microsoft Security Essentials is free* and easy. Once you have installed it, the software updates automatically once a day. We’re constantly tracking new threats and we keep your PC updated to help protect you.