http://msmvps.com/blogs/bradley/archive/2004/09/14/13534.aspxUPDATED WITH THIS KB: http://support.microsoft.com/?id=885819 I just reposted the workaround for the Windows Update and ISA Server issue There's one more step that has been added to fix XP sp2 machines Ensure Internet Explorer patches are up to date andenCommunityServer 2008.5 SP2 (Build: 40407.4157)