Microsoft Security Essentials icon

Microsoft Security Essentials for Windows

7.8
A free antivirus software from Microsoft

Old Versions of Microsoft Security Essentials

If the latest version doesn't work on your computer, you can browse old versions of Microsoft Security Essentials for Windows below and download the software version best suited for your PC. Follow the simple steps below to learn how to check your Windows system and hardware specs:

1. Type "System Information" in the Windows taskbar search field.
2. Click on "System Information" to open the application window.
3. Click on "System Summary" to find the system and hardware details, including your Windows version, processor, and memory, etc.
Microsoft Security Essentials4.10.209.0
Aug 21, 2023
Download
Microsoft Security Essentials4.8.204.0 (64-bit)
Nov 10, 2015
exe64 bit
Download
Microsoft Security Essentials4.8.204.0 (64-bit)
Nov 10, 2015
exe64 bit
Download
Microsoft Security Essentials4.8.204.0 (32-bit)
Nov 10, 2015
exe32 bit
Download
Microsoft Security Essentials4.8.204.0 (32-bit)
Nov 10, 2015
exe32 bit
Download
Microsoft Security Essentials4.5.0216.0
Apr 14, 2014
exe64 bit
Download
Microsoft Security Essentials4.5.0216.0 (64 bits)
Apr 9, 2014
exe64 bit
Download
Microsoft Security Essentials2.1.1116.0 (64 bits)
Nov 24, 2011
exe64 bit
Download
Microsoft Security Essentials2.1.1116.0 (64 bits)
Nov 24, 2011
exe64 bit
Download
Microsoft Security Essentials2.1.116.0 (64 bits)
Jun 16, 2011
exe32 bit
Download
Show More

Alternatives to Microsoft Security Essentials