Okay. Here's the latest...
I've reinstalled IIS. Now everything appears to be working fine except:
From this machine

server name:ztm-pdc, IP: 10.1.0.100)
If I type
in the browser window, I see the site fine. - I know IIS is working...correct?
If I type
I see the site fine.
If I type
(which is the server name) I get a socket error - Host name lookup for 'ztm-pdc' failed.
If I type
I get a browser error - your browser sent a malformed request.
Any other machine on the network:
works fine
returns a socket error - Host name lookup for 'ztm-pdc' failed.
I can ping the server from any machine on the network using either 10.1.0.100 or ztm-pdc
from this machine I can ping localhost, ztm-pdc, 10.1.0.100, and 127.0.0.1
I have added a line in my hosts file:
10.1.0.100 ztm-pdc
What am I missing?..it has to be simple.