Microsoft Security Essentials

Microsoft Security Essentials

Microsoft – 10.6MB – Freeware
out of 165 votes
image/svg+xml VERY GOOD User Rating
Microsoft Security Essentials (MSE) (previously codenamed Morro) is a free antivirus software created by Microsoft that provides protection against viruses, spyware, rootkits, and trojans for Windows XP, Vista, and 7. MSE replaces Windows Live OneCare (a subscription antivirus service) and Windows Defender, which only protects users from adware and spyware. It is geared for home use, unlike Microsoft's upcoming enterprise-oriented product Microsoft Forefront.


Microsoft Security Essentials is a Freeware software in the category Security developed by Microsoft.

It was checked for updates 5,184 times by the users of our client application UpdateStar during the last month.

The latest version of Microsoft Security Essentials is , released on 12/01/2016. It was initially added to our database on 06/25/2009. The most prevalent version is , which is used by 65 % of all installations.

Microsoft Security Essentials runs on the following operating systems: Windows. The download file has a size of 10.6MB.

Users of Microsoft Security Essentials gave it a rating of 4 out of 5 stars.

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5,184 users of UpdateStar had Microsoft Security Essentials installed last month.
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