Microsoft Security Essentials 4.4.304 ( x86 / x64 )
Microsoft Security Essentials provides real-time protection for your
home or small business PC that guards against viruses, spyware, and
other malicious software.
Microsoft Security Essentials is a free* download from Microsoft that is
simple to install, easy to use, and always kept up-to-date so you can
be assured your PC is protected by the latest technology.
Microsoft Security Essentials runs quietly and efficiently in the
background so you’re free to use your Windows-based PC the way you
want—without interruptions or long computer wait times.
Before installing Microsoft Security Essentials, we recommend that you
uninstall other antivirus software already running on your PC. Running
more than one antivirus program at the same time can potentially cause
conflicts that affect PC performance.
Supported Operating System:
Windows 7, Windows Vista, Windows XP
Minimum system requirements for Microsoft Security Essentials
Operating System: Windows XP Service Pack 3 (SP3)*; Windows Vista (Service Pack 1, or Service Pack 2)*; Windows 7*
For Windows XP, a PC with a CPU clock speed of 500 MHz or higher, and 256 MB RAM or higher.
For Windows Vista and Windows 7, a PC with a 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.
An Internet connection is required for installation and to download
the latest virus and spyware definitions for Microsoft Security