DHCP fails in XP, Dual boot XP and 7

The XP side might be timing out before it gets an address from the DHCP server.  Open a command prompt by open the run command and in the empty field enter cmd and click OK - this will open a window the command prompt.

Enter ipconfig and depress the enter key.  If 169.254.X.X is displayed for the ip address the time out occurred.  So, you still should be at the command prompt - ipconfig /release

That will release the ip address.  Now - enter ipconfig /renew

If 169.254.X.X is ip addres again there could a number of problems.

I would start by running: "netsh int ip reset resetlog.txt"  - without the quotes; this will reset the tcp/ip stack.  the resetlog.txt is the creation of the results to a file named resetlog.txt and is required or at least any file name with text extention. (ie. xxxxx.txt).  And restart the computer even if you are not prompted to.

If that does not work, uninstall the network adapter by going into the hardware device manager and expanding the network adapters and right clicking the adapter select uninstall.  And restart the computer.  The driver should be found again automatically.

This computer isn't part of a domain is it? I have have had this issue before when moving an office from xp to 7.

It is not a matter of timing ... I can release and renew and the little orb continues to go around and I never get the yellow triangle.  I removed the drivers as my first reaction to the problem and the stack should have been reset with the WinSockFix program.

Yes, the computer is on a Domain.  This computer has been connected in this configuration for over a year and suddenly started with the issue.

When you connect to the network with the xp machine it will be identified as the windows 7 machine, mac address is the same.

I have not been back on site.

I will try the second nic, but remember that the nic works when we boot into Windows 7 on that same machine.

I replaced the card and everything went back to normal