Sorry for posting this in another area, these communities are kind of confusing. (Other location is here: http://communities.intel.com/thread/13538?tstart=0 )
Just some highlights for the problem:
The device itself is labelled PRO1000CT Desktop Adapter (accord to the sticker on the physical device). It's installed in a Win7 machine. The original driver that was installed by default is "Intel(R) Gigabit CT Desktop Adapter" - Driver provider Intel, Driver date 12/4/2009, Driver version 126.96.36.199, e1q6232.sys. I've installed http://downloadcenter.intel.com/Detail_Desc.aspx?agr=Y&DwnldID=18718&ProdId=3025&lang=eng and am told that was the correct course of action.
The problem is the Auto-Negotiate and 1Gbps settings don't work. It doesn't detect any sort of link (I've tried it with two different computers, using two different ethernet connections (NVIDIA nForce Networking Controller, Provider Microsoft, Date 10/17/2008, Version 188.8.131.52, nvm62x32.sys in one machine and Intel 82567v-2 gigabit network connection, Provider microsoft, date 18/08/2008, version 10.0.2.2, ely60x64.sys in the other), with two different ethernet cables.
I know the other devices work because I have a 2nd NIC in the same machine as the problem NIC which links just fine using Auto-Negotiate and the 1Gbps setting.
I'm not sure what else I can do. I ran the diagnostic tests provided in the driver download and everything passed except the connection test because I had to force 100Mb:
Cannot run the connection test.
TCP/IP protocol not configured.
To run this test, this connection must
be configured to use the TCP/IP protocol.
This adapter is configured to force the
speed to a low speed.