Windows Vista expects routers to use DHCP BROADCAST flag. But not all routers does. Result: The Vista box don’t get an IP address from the DHCP server where XP, Seven, Linux and Mac boxes works just fine. To fix this:
- Go to Start -> execute and type regedit
- Find the following key :
Where (GUID) is the identifier of your network card. If you have many cards (like ethernet and wireless) and don’t know which one to choose, you can make the modification on both cards.
- Create a new DWORD 32 bits value.
- Name it DhcpConnEnableBcastFlagToggle.
- Modify it value to 1.
- Close the Registry Editor and restart your network connection.
Source: Microsoft KB