Helps guard your PC against viruses, spyware, and other malicious software

Microsoft Security Essentials (32-bit)

Microsoft Security Essentials (32-bit)

  -  11.66 MB  -  Freeware
  • Latest Version

    Microsoft Security Essentials 4.10.209 (32-bit) LATEST

  • Review by

    Michael Reynolds

  • Operating System

    Windows Vista / Windows 7 / Windows 8

  • User Rating

    Click to vote
  • Author / Product

    Microsoft Corporation / External Link

  • Filename


  • MD5 Checksum


The Internet is home to various malicious intruders such as viruses, trojans, worms, and spyware. Microsoft Security Essentials 32-bit provides top-notch protection against these threats without causing disruptions.

Microsoft Security Essentials (32-bit) Screenshot 1

Although designed for individuals and small businesses, MSE utilizes the same technology used by Microsoft to safeguard large enterprises through security products like Microsoft Forefront, Malicious Software Removal Tool, and Windows Defender.


Microsoft Security Essentials (MS Security Essentials) is a free antivirus program developed by Microsoft Corporation. It serves as a crucial defense against malware, viruses, spyware, and other potentially harmful software. With its user-friendly interface and real-time protection, it ensures the security and stability of Windows-based systems.

The software has received significant recognition for its protective capabilities, including the VB100 award from Virus Bulletin Ltd., Checkmark Certification from West Coast Labs, and certification from the ICSA Labs. It is easy to download and install, and the software automatically updates itself once a day.

The program employs green, yellow, and red color codes to indicate the security status of your PC, with a color-coded icon in the taskbar providing a quick glance at whether attention is required. The system is straightforward: green signifies safety, while red or yellow alerts indicate potential threats. The antivirus software promptly notifies you and offers recommendations on how to proceed, allowing you to take action directly from the notification area without accessing the application.

MS Security Essentials operates quietly in the background and only alerts you when specific actions are necessary. When you're away or occupied, it can take default actions on your behalf. Later, you can review and undo these actions if desired.

This security software is efficient and compact, ensuring that your PC remains responsive even during scans and updates. It is suitable for all types of computers, from older PCs to new ones, laptops, and netbooks.


Real-time Protection
Actively scans your computer in the background, providing continuous protection against known and emerging threats.

Malware Detection and Removal

Utilizes a comprehensive database to detect and remove various types of malware, including viruses, Trojans, worms, and spyware.

Scheduled Scans
Allows users to schedule regular scans to ensure ongoing protection and maintain system security.

Automatic Updates
Updates virus and spyware definitions automatically to stay up to date with the latest threats.

Quarantine Management
When suspicious files are detected, the software isolates them in a quarantine folder, preventing harm to the system. You have the option to review and remove them if necessary.

How to Use
  • Download: Visit the official Microsoft website or and download the installation file that corresponds to your operating system.
  • Installation: Run the downloaded file and follow the on-screen instructions to complete the installation process.
  • Configuration: After installation, the program starts running in the background. Access the program's settings to customize the scanning schedule and other preferences according to your needs.
  • Scanning: The software automatically scans your system, but you can initiate a manual scan at any time.
  • Reviewing Threats: If any threats are detected, the software notifies you and provides options for removal or quarantine.

Why has Microsoft Security Essentials been discontinued?
Microsoft Security Essentials is no longer available for new installations because it is tied to the unsupported Windows 7 operating system. Microsoft now focuses on Windows 11/10 and recommends users transition to these newer operating systems for the best security options. Consequently, the availability of Microsoft Security Essentials has ceased.

Will Microsoft Security Essentials still work on my system?
While new installations are no longer possible, existing installations will continue to function. Microsoft will provide signature updates for Microsoft Security Essentials until 2023 to ensure the software remains effective against known threats. However, without ongoing support and updates, the software may become less effective over time, leaving your system more vulnerable to emerging threats. It is highly recommended to upgrade to Windows 11/10 and utilize Windows Defender (Windows Security) Antivirus, the successor to Microsoft Security Essentials, which offers enhanced security features.

Is Microsoft Security Essentials 32bit free?
Yes, the program is available for free to Windows users.

Does it work with Windows 11/10?
No, the software is not compatible with Windows 11/10. However, Windows 11 and 10 include Windows Defender (Windows Security), which provides similar functionality.

Can I use Microsoft Security Essentials alongside other antivirus software?
It is not recommended to run multiple real-time antivirus programs simultaneously as they may conflict with each other. Uninstall any existing antivirus software before installing "MSE."

Does Microsoft Security Essentials offer protection against ransomware?
While the software offers solid protection against various malware types, it is recommended to use dedicated anti-ransomware solutions alongside antivirus software for enhanced security.


Malwarebytes: Specialized anti-malware tool that focuses on detecting and removing malware infections.

Avast Free Antivirus: Popular free antivirus program with robust features and a user-friendly interface.

AVG AntiVirus Free: Offers a wide range of features, including real-time protection, automatic updates, and email scanning.

Avira Free Security: Provides essential protection against malware and includes additional features such as a VPN and system optimization tools.

Bitdefender Antivirus Free: Lightweight and powerful, offering excellent malware detection with minimal system impact.

System Requirements
  • Operating System: Windows Vista (Service Pack 1 or 2) and Windows 7
  • For Windows Vista and Windows 7: CPU clock speed of 1.0 GHz or higher, and 1 GB RAM or higher
  • VGA display of 800 × 600 or higher
  • 200 MB of available hard disk space
  • Internet connection is required for installation and downloading the latest virus and spyware definitions
  • Internet browser
  • Free for genuine Windows users
  • Lightweight with minimal resource consumption
  • Provides real-time protection against malware and viruses
  • Regular automatic updates keep the software up to date
  • User-friendly interface suitable for users of all skill levels
  • Limited compatibility, not available for Windows 11/10
  • Microsoft will provide signature updates until 2023
  • Lacks some advanced features compared to premium antivirus solutions
  • May not offer dedicated protection against specialized threats like ransomware
Also Available: Microsoft Security Essentials (64-bit)

  • Microsoft Security Essentials 4.10.209 (32-bit) Screenshots

    The images below have been resized. Click on them to view the screenshots in full size.

    Microsoft Security Essentials 4.10.209 (32-bit) Screenshot 1
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