Microsoft Security Essentials

Microsoft Security Essentials

Provides real-time protection for home or small business PCs, against viruses, spyware, and other malicious software


Microsoft-Security-Essentials-4-128x128

NEW: MICROSOFT SECURITY ESSENTIALS 4.9.218.0

May 31st, 2016

Microsoft Security Essentials 4.9.218.0
Provides real-time protection for home or small business PCs, against viruses, spyware, and other malicious software

  • Start the Windows Update service if stopped
  • Choose the installer for Security Essentials, based on the OS architecture
  • Install Security Essentials
  • Choose the installer for antivirus and antispyware definitions, based on the OS architecture
  • Install antivirus and antispyware definitions
  • Choose the installer for Network Inspection System updates, based on the OS architecture
  • Install Network Inspection System updates
Command line arguments
<none> - Minimally interactive install
/u - Unattended install
/s - Silent install
Exit codes
Common exit codes




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