Microsoft Security Essentials is not support Windows 2008

From http://www.microsoft.com/Security_Essentials/resources.aspx?mkt=en-us&s=1#mainNav: Microsoft Security Essentials only support Genuine Windows XP (Service Pack 2 or Service Pack 3); Windows Vista (Gold, Service Pack 1, or Service Pack 2); Windows 7

And AVG also not support windows2008. Quiet strange.