Shoutbox

You can use the workaround on this page to exclude Windows Live Messenger from DEP.

http://support.microsoft.com/kb/875351

You could change a WLM shortcut so it runs as Administrator, which fixes the DEP problem.

http://social.msdn.microsoft.com/Forums/en/wlmess...-97e8-91b26143d1d7

Source: http://www.google.com/search?q=DEP+WLM

So in answer to your question, it's not related to Plus!.