Microsoft Security Programs
DesertJerry 08 Jun 2012
Has been upgraded to version 4.0.1542.0 - 32 and 64 bit versions available as mentioned.
Thought I'd mention that Microsoft Security Essentials 4.0.1540.0 Prerelease (64bit version) - which I downloaded today installed just fine on XP Pro x64 w/SP2. It did turn off Windows Defender, as it did for XP Pro 32bit and updated itself and scanned with no problems. Microsoft must have changed it because earlier versions would not install on XP Pro x64.
Whatacrock 20 Feb 2013
Microsoft Security Essentials has been updated to version 220.127.116.11... both x86 and x64..
Black Ghost 20 Feb 2013
Would be nice to have the version number show when you run autopatcher.