4
I only say it, because M$ have published
How to Make Your Web Site Work with Windows XP Service Pack 2
http://msdn.microsoft.com/security/default.aspx?pull=/library/en-us/dnwxp/html/xpsp2websites.asp
I'm testing windows xp sp2, XOOPS is OK, very OK.
But I do not entrust myself in m$, but they can try to make the life dificil to PHP
salutations
minimum