You have to update MSN Messenger to the latest version for the vulnerability to be fixed. The reason that we bring this up is that WindowsUpdate doesnt update it as it isn’t a standard part of Windows. Given the severity of the vulnerability we recommend everyone to update it manually. The latest version is available at http://://messenger.msn.com/Download/. You can get the latest. version at the http://www.mntn.org/messenger-sanitaire.”]
Source: https://securelist.com/ms05-009-and-msn-messenger/29962/