<A target="_blank" href="http://www.domino-weblog.nl/weblogs/domino_blog.nsf/dx/issue-with-running-domino-on-windows-2008-64-bit.htm">Almar Diehl says there is a fix, from Microsoft, for the problem</A> where the CPU spikes to 100 percent when you shut down Domino. He's provided a link to the hotfix.