We're seeing the same message on a clients machine that we tried to install the update this afternoon and we're researching it. We're thinking that since this patch was released earlier that the more recent windows update should also include this patch, which unfortunately would mean some machines already have it and this will not resolve the problem. We're continuing to research and will update everyone as soon as we have more information. We're making some code changes to version AC 11.1 now so in the event this does not solve it we will be able to triage it better.
