The question has been closed for the following reason "The question is answered, right answer was accepted" by kevinlockergnome Aug 07 '12 at 19:20
Yes, Microsoft Security Essentials has the ability to automatically update. It is said on Microsoft Security Essential's download page http://windows.microsoft.com/en-US/windows/products/security-essentials
answered Aug 07 '12 at 04:11
it sure does for sure update automatically it also updates when there are program updates you do have to becarfull with it though if you dont keep windows up to date the security will crash and from my experance the whole computer with it if a security update comes and the program is not up to date or out of sync ..
have 4 computers and seems to hold true on all 4 of them here