I bought a new PC (HP Pavillion dv-3178ca) and purchased the upgrade from Windows 7 Home edition to Windows 7 Professional because I connect to a domain at work and I'm having trouble with my network connection only when connecting to a domain. If I connect to a normal router it works fine and I get an IP address internet connection etc but if I connect to cable on a domain network , it shuts down the network card altogether and I cannot see the domain or get an IP to even try to log on to it. If I plug it back into a non-domain network cable it works fine.

Have you asked your IT guys at work? Could be they're doing some kind of MAC filtering.-B- http://www.officeforlawyers.com Author: The Lawyer's Guide to Microsoft Outlook

There is no mac filtering. The network connection shows disconnected but if I plug my onld PC into the same connection it works fine

I suggest you reinstall the network adapter driver. If the issue persists, temporary disable the antivirus and firewall and check the result again. If the above suggestions do not help, please exit the domain, and remove the Object of this computer from AD. Then re-join the domain and check the result.Arthur Xie - MSFT

We had already tried uninstalling and re-installing the network adapter driver without success. The problem is that the PC never sees the domain to get to the point of trying to log on. We have another Windows 7 PC able to log on to the domain.

MAC filtering would be machine specific unless you moved the network adapter from machine to machine. As a test, if you statically assign the IP configuration on that machine can you see network resources and join the domain? I seem to recall we had a client whose DHCP server wouldn't give addresses to any machines not members of the domain - which is of course a bit of a Catch-22. Their solution was to reserve a single address just outside their scope ("192.168.20.250" I seem to recall) and use that to configur the workstation and join it to the domain. Then they could switch the workstation back to DHCP and it would work fine.-B- http://www.officeforlawyers.com Author: The Lawyer's Guide to Microsoft Outlook