I don't regard editing the Registry as a hack in these circumstances - mainly because I can't think of a GUI setting you could change. I'm not at a W7 machine at the moment and could be wrong but go into the Registry, make a backup from the File>Export menu and note where you put it. Then,. navigate to HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Netbt\Parameters
and delete the DhcpNodeType value if it’s there. That, after a restart, should be sufficient but if it's not, post back - you may need to create that DWord and add a setting or two.