And oddly enough, just last night when I was updating an XP machine with the WEPOS patch, Microsoft Update offered me Security Essentials and Windows Live Essentials 2011. I took it up on its offer to install Security Essentials and it worked absolutely fine. Maybe I'll try WLE2011 next.Mmmh, as far as I know, Windows Live Essentials 2011 doesn't work on Windows XP, and requires Windows Vista or above. Does Microsoft Security Essentials still update definitions?Edit: Found offline installers for Windows Live Essentials 2012 here.

And oddly enough, just last night when I was updating an XP machine with the WEPOS patch, Microsoft Update offered me Security Essentials and Windows Live Essentials 2011. I took it up on its offer to install Security Essentials and it worked absolutely fine. Maybe I'll try WLE2011 next.Mmmh, as far as I know, Windows Live Essentials 2011 doesn't work on Windows XP, and requires Windows Vista or above.
Windows Live Essentials 2009 Offline Installer English

Does Microsoft Security Essentials still update definitions?Edit: Found offline installers for Windows Live Essentials 2012 here.