OK, found the solution elsewhere.
Here it is.
1. Click Start, click Run, type regedit, and then press ENTER.
2. Locate and then click the following registry subkey:
HKEY_LOCAL-MACHINE\SYSTEM\CurrentControlSet\Control\Network
3. Right-click this subkey, click Export, and then save the selected
branch in a file.
4. Click the Network subkey again, and then delete the Config entry. Do
not delete the Network subkey. The Config entry will be reconstructed when
you restart the computer.
5. Restart the computer. You may have to manually turn off the computer.
There was also some useful information at
http://support.microsoft.com/kb/825826 but I was not able to fix the problem
with the information contained there.