Microsoft Security Essentials  Icon

Microsoft Security Essentials is a free and simple security tool by Microsoft for individuals or small businesses. It’s an antivirus, anti-malware, and anti-spyware designed to prevent hackers from accessing your computer, and remove viruses, spyware and other malicious software in real-time. Also, It’s user-friendly and always kept up-to-date, so you know your PC is protected at all times.

The program runs quietly in the background, scheduling a scan when the computer is most likely idle, so you can use your Windows PC as you wish without interruptions. You only see alerts when it is necessary for you to take action. Further, it uses minimal system resources, so you won’t have any trouble doing your work or enjoying yourself. It’s recommended to uninstall any other antivirus software on your PC before installing Microsoft Security Essentials. More than one antivirus program running simultaneously can potentially cause a performance problem on your PC.

Microsoft Security Essentials, was launched in 2008, was limited to individuals/home users. However, Microsoft expanded the licensing program in 2010 so that businesses with 10 PCs or fewer are eligible too. Since Windows 8 was launched two years later, MSE was replaced by the built-in tool – Windows Defender.The program is free to use for commercial purposes (home users as well as small and medium businesses) and up to ten devices in your business. MSE license.

Key Features

  • Easy to install and easy to use
  • Low on system resources
  • Comprehensive malware protection
  • Automatic updates and upgrades
  • Quiet protection

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Last Update: November 29, 2016

Current Version: 4.10.0209.0

License: Freeware

Languages: Multiple Languages

Supported Operating Systems:
Windows Vista / 7 (32-Bit, 64-Bit)

Developer: Microsoft Corp.


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