I upgraded my Windows 7 Home to SP1 on a Toshiba A655-11T. Following that, on every restart the onboard GbE, though enabled, won't get a new IP from a DHCP server. Without doing anything with the adapter, renewing the wifi IP from the same DHCP server, causes the GbE NIC to get a new IP too. This allows me to disconnect the wifi and keep on working on the GbE. I upgraded t the latest Realtek drivers, but it's the same. DHCP will try but won't set IP to the GbE adapter, only after the wifi does. Any ideas what did Windows 7 SP1 introduce to break the DHCP client functionality? Can this be fixed? Thanks.

SP1 did not break DHCP on my 3 desktops nor my 2 laptops. I don't have idea what to look for, but I suggest you go to the Toshiba support forums and pose your problem there.Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Thanks Rick. I also did the same upgrade on two other machines. No issues there. I did post on Toshiba forums, and they told me it's MS.

Hi igald, Can you noramlly ping that DHCP server? Does it work if you manually set an IP address? Please check if the DHCP Client service is started. Click Start, input services.msc, press Enter. On the right pane, find the DHCP Clent, set it to Automatic. Also try to reset the TCP/IP, refer to: How to reset Internet Protocol (TCP/IP) In addition, is it a non-Microsoft DHCP server? If so, try the following steps to fix the issue: 1. Click Start, input regeidt in the search box and press ENTER. (with administrative privileage) 2. Locate and then click the following registry subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{GUID} In the registry path, click the {GUID} subkey that corresponds to the network adapter that is connected to the network. 3. On the Edit menu, point to New, and then click DWORD Value(32 bit) 4. In the new value #1 box, type DhcpConnEnableBcastFlagToggle and press ENTER. 5. Right-click and modify DhcpConnEnableBcastFlagToggle, type the value 1, click OK. Regards, Miya This posting is provided "AS IS" with no warranties, and confers no rights. | Please remember to click "Mark as Answer" on the post that helps you, and to click "Unmark as Answer" if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

HI Miya! That was perfect! I first added the DhcpConnEnableBcastFlagToggle, restarted and it didnt help. I disn't remove it, just then reset the TCP parameters, restarted and all's back to normal. I wonder what SP1 modified in those two registry settings the reset brings back to default, but that's water under the bridge here. I hope it'll help others too. Thanks again for this solution! -Igal

Hi Igal, You're welcome. Glad it helps. Regards, MiyaThis posting is provided "AS IS" with no warranties, and confers no rights. | Please remember to click "Mark as Answer" on the post that helps you, and to click "Unmark as Answer" if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.