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Changes
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some tidying up and description of product
Microsoft Security Essentials, available from http://www.microsoft.com/security_essentials/, protects from viruses, spyware, and other malicious software.
It is free to "use any number of copies of the software on your devices in your household for use by people who reside there or for use in your home-based small business."; for other use cases Microsoft's equivalent product is Forefront Client Security.
== WPKG Package ==
This is a silent installer and uninstaller for Microsoft Security Essentials, (Windows XP, US English, 32-bit version), different binaries are available for other systems.
<source lang="xml">
id="microsoft-security-essentials"
name="Microsoft Security Essentials"
revision="23"
reboot="false"
priority="1">
<install
cmd='%SOFTWARE%\ms_security_essentialsmicrosoft-security-essentials\mssefullinstall-x86fre-en-us-xp.exe /s /runwgacheck' />
<upgrade
<remove
cmd='%SOFTWARE%\ms_security_essentialsmicrosoft-security-essentials\mssefullinstall-x86fre-en-us-xp.exe /s /u'/>
</package>
</source>
Note than that an upgrade line is required because although the program may update updates itself (though I'm not certain it does)automatically using Windows Automatic Updates, if you bump the revision number then WPKG will want to run an 'updateupgrade'.
== Installer command-line switches ==
* /runwgacheck - automatically perform a Windows Genuine Advantage check
* /o - don't automatically run the updater and the system scan after installation - when you then login it may then give a red indicator and say that real time protection is off because virus definition files are out of date. I've had a few differing experiences at this point, either it updates them quickly automatically, or if you click on the system tray notification area icon it tells you it's out of date but then updates it quickly, or it displays this then just waits for you to manually press the 'Update' button. This is as both an Administrator and as a Limited User.
== White-listing ==