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Windows Apps for Antivirus. Detect and remove viruses, malware, and other malicious software before they have a chance to damage your system. Modern antivirus tools can offer additional benefits. Microsoft Security Essentials reached end of service on January 14, 2020 and is no longer available as a download. Microsoft will continue to release signature updates (including engine) to service systems currently running Microsoft Security Essentials untill 2023. Why is Microsoft Security Essentials no longer available?

Windows Security Essentials Download X64

Resolution

Note You must have Microsoft Security Essentials installed to use the latest Microsoft Security Essentials virus and spyware definitions.
Before you install the correct version of the Microsoft Security Essentials virus and spyware definition updates, you must know:

• Whether Windows XP, Windows Vista, or Windows 7 is running in a 32-bit or a 64-bit operating environment.

• Whether you are logged on to Windows as an administrator.

If you are not sure of your Windows XP, Windows Vista, or Windows 7 environment type, or if you need help verifying that you are an administrator on the computer, go to the Verify your environment and determine whether you are logged on with an administrator account Microsoft website.
After you verify the operating environment, follow these steps:

1. Download the Microsoft Security Essentials virus and spyware definition update file that is appropriate for your version of Windows:

   
   Note You must be running a 64-bit version of Windows to run a 64-bit version of Microsoft Security Essentials. The 64-bit versions of Windows include x64-based versions of Windows.

2. Click Run to install the definition update file immediately. Or, click Save to save the file to the computer. If you click Save, remember the folder where you saved the file.

3. To install the saved file, follow these steps:

   • Windows XP
     Double-click the file, and then click OK.

   • Windows Vista or Windows 7
     Right-click the file, and then click Run As Administrator. If you are prompted for an administrator password or for confirmation, type the password, or click Continue.

4. When the definition update file runs, a file extraction dialog box appears. The dialog box indicates that the definition update is installing. After the file extraction dialog box closes, you can verify that the virus and spyware definitions were updated. To do this, open Microsoft Security Essentials, click Update, and then examine the virus and spyware definitions status.

Use Microsoft Security Essentials to guard against viruses, spyware, and other evil software. It provides real-time protection for your home or small business PC's.

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.

Microsoft Security Essentials

Free Microsoft Security Essentials

Microsoft Security Essentials (MSE) is the bare minimum protection for your PC running Windows 7 or Vista. Installs quickly, just make sure there are no other antivirus applications installed or you may have Windows issues.
Some of the features & benefits are:

• Free!
• Real-time protection against spyware, viruses, rootkits, and other malicious software.
• Online system scanning and cleaning.
• Dynamic signature service.
• Offline system scanning and cleaning.

If you have Windows 8, Windows 8.1, or Windows 10, then Windows Defender is already included and ready to go if no other protection is installed.

Download Windows Security Essentials

Download Microsoft Security Essentials

NOTICE: The links will open a connection to a third-party site. ESL cannot ensure the security of software that is hosted on external sites.