Are you sure that Microsoft's released a patch? I remember that there was a third-party patch, and that Microsoft hoped to have one ready by the 10th, but I don't see one available through Windows Update right now. The only thing available is the "Microsoft .NET Framework 1.1 Service Pack 1". And that doesn't really sound like the patch in question, from what I can tell. Maybe I'm just growing ever-more computer illiterate, though...