In general, many of these bulletins have a lower impact in terms of severity and are much more difficult to exploit on newer operating systems such as Windows XP SP2 and Windows Server 2003 SP1.
It only affected Windows 2000. So far it has shown a very limited impact -- we're not seeing any widespread impact to the Internet, but we remain vigilant.
We saw the exploit code and our Security Windows Reaction Team tested it against the patch, and we were convinced we would see an attack. It was only a matter of time,
Among the critical updates, customers who run older versions of the operating system such as Windows 2000 should prioritize MS05-051 for deployment on those systems.