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Windows 7: DHCP - WIN7 64Bit - Not Working

13 Aug 2011   #1

Windows 7 Ultimate x64
DHCP - WIN7 64Bit - Not Working


I just installed a new version of windows 7 64bit Ultimate. I am currently having an issue with obtaining a IP address using DHCP. I can connect using a Fixed IP address. Windows defaults to 169.X.X.X address and subnet mask of

Any Ideas Of what could be the issue.

Machine has all latest patches and is fully registered licience


My System SpecsSystem Spec

13 Aug 2011   #2

Windows 8 Core X64

Have you tried Control Panel, Windows Firewall, Troubleshooting my network while using DHCP?

Is DHCP Client started in Services?
My System SpecsSystem Spec
13 Aug 2011   #3

Windows 7 Ultimate x64

DHCP has started on startup as per normal. Tried also reinstalling windows again thinking that windows might of corrupted during installation still a NO GO.

Fixed Ip is working great but would like to work on DHCP.

MOBO i am using is a Gigabyte 990FXA-UD5
Processor - AMD Phenom II 1090T
My System SpecsSystem Spec

14 Aug 2011   #4

Windows 8 Core X64

That board uses Realtek 8111E chip (10/100/1000 Mbit) chip for network (Gigabit). I don't see anywhere that should cause a DHCP problem.

I did find this: Windows Vista cannot obtain an IP address from certain routers or from certain non-Microsoft DHCP servers. I know it's for Vista but Windows 7 and Vista are very much alike. Check the "Let me fix it myself" section and see if adding a new DWORD value of DhcpConnEnableBcastFlagToggle fixes this for you. If not you can always delete it again (or leave it).

Also check to see if there is a firmware update for your router.

Can you borrow another router to try?
My System SpecsSystem Spec
17 Aug 2011   #5

Windows 7 Ultimate x64

All good thanks for your help guys.

Worked it out. It was really strange. I use a seperate switch to connect to as I have multiple devices connected to the one lan port. This was the issue.

So what i done was connect straight directly to the wall socket that leads to the router then connected fine on DHCP.

I then disconnected it and reconnected it to my switchbox and worked fine ever since. Got no idea why it couldnt find a IP the first time looks like i just needed it to connect directly to the wall socket for the first time
My System SpecsSystem Spec
05 Nov 2011   #6

Windows 7 Home Premium x64 SP1


I've got sampe problem, I have changed NIC as well and it din't help. It works fine with static IP, I have decided to use static IP, cause there is no other choise.
My System SpecsSystem Spec

 DHCP - WIN7 64Bit - Not Working

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