Slow response on websites after installing latest updates

I have installed the latest updates on our IIS server (Win 2K SP4, IIS 5.0,
resides on our DMZ) and on our DNS server (Win 2K SP4). Since I rebooted all
servers I am experiencing slow response time when trying to access our
websites via internal machines, however the sites are loading fine
externally. It doesn't matter if I try to connect using the IP address of
the site or the DNS name both are slow. When I try to load the page in IE it
starts to load but then displays a message 17 items remaining. It eventually
loads the page but it's extremely slow.

I have looked in the event log to see if there are any indications on what
may be going on but don't see anything. The only thing that has changed are
the Windows updates.

Has anyone else experienced this problem?

Thanks in advance for any help.

Nancy