On Sat, 30 Sep 2006 14:51:45 -0400, AJR wrote:

> MAC is a hardware address "permanently burned-in" by the
> manufacturer. If Windows detects two identical MACS a system event log
> entry is generated and network connectivity cease.

Is the MAC address "really" burned in?
MacMakeUp seems to "change" the MAC address at will.
http://www.gorlani.com/publicprj/mac.../macmakeup.asp

I just checked the WinXP System Event Log by right clicking on "My
Computer" and selecting "Manage" and then selecting "System Tools", "Event
Viewer", "System".

I am not sure what to look for, but, I did see......
The system detected that network adapter
\DEVICE\TCPIP_{BAACBE02-D4AF-43D0-BF89-D45C0B039834} was connected to the
network, and has initiated normal operation over the network adapter.

And ...
Your computer was not able to renew its address from the network (from the
DHCP Server) for the Network Card with network address D45C0B039834. The
following error occurred:
The semaphore timeout period has expired. . Your computer will continue to
try and obtain an address on its own from the network address (DHCP)
server.

This may or may not be a red herring because the sysytem "seems" to be
working well.

Jette