Windows · Free download · Adware, Spyware and Virus Protection

Microsoft Security Essentials - MSE4.2.223

Microsoft Security Essentials - MSE - The official, free antivirus solution from Microsoft for Windows 7 and Vista computers, which provides basic protection against malware

Operating system
Windows 10/11
File size
11.7 MB
License
Freeware
Last updated
May 1, 2026
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Overview

What is Microsoft Security Essentials - MSE?

Microsoft Security Essentials - MSE - The official, free antivirus solution from Microsoft for Windows 7 and Vista computers, which provides basic protection against malware

In depth

A closer look at Microsoft Security Essentials - MSE

Microsoft Security Essentials (MSE) In order to get updates for XP, don't forget to apply the XP registry patch Installing MSE

Requirements

System requirements

Windows 7 64-bit / Windows 7 / Windows Vista 64-bit / Windows Vista / Windows XP

Verdict

Should you download Microsoft Security Essentials - MSE?

Microsoft Security Essentials - MSE runs on Windows 10/11 and is available under the Freeware license — the installer is 11.7 MB. We’ve catalogued it under Adware, Spyware and Virus Protection.

Verified clean. Every Microsoft Security Essentials - MSE build on SoftLookup is scanned for viruses, spyware, adware, trojans and backdoors. We re-test on every update.
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At a glance

Microsoft Security Essentials - MSE specifications

Category
Adware, Spyware and Virus Protection
Publisher
Microsoft
Last updated
May 1, 2026
Requirements
Windows 7 64-bit / Windows 7 / Windows Vista 64-bit / Windows Vista / Windows XP
License
Freeware
Operating system
Windows 10/11
File size
11.7 MB
Price
Free
Page views
1197

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