http://blogs.technet.com/rhalbheer/archive/2008/12/04/only-1-91-of-pcs-are-patched.aspxWell, honestly, I am not completely clear how statistically relevant this data point is. I just read it in a secunia blog where they published figures of users of their free solution. This is data of the last few weeks and looks into the results of theen-USCommunityServer 2.1 SP1 (Build: 61025.2)