DHCP failing

  • Thread starter Thread starter Ian McLeish
  • Start date Start date
I

Ian McLeish

Help!!

I have Ultimate edition, which until last week was happily connecting to a
Belkin router, and was set to get an ip address automatically. Now it never
gets one. I have done the obvious- changed cables, router ports, uninstalled
and reinstalled drivers, but just keep getting the same "Unidentified
network, limited connectivity", and an APIPA private made up IP address. I
have tried everything I know to try. Found a KB article about using DHCP in
administrative tools to set the scope of the ip addressing, but this doesn't
detect any router anyhow. Connecting my laptop to the same cable almost
instantly gets it an ip address.

I am beginning to look at a full reinstall, unless anyone can give me any
advice.

May not be related, but I recently seemed to lose the C\Windows\temp folder,
which caused a problem with opening stuff requiring UAC, but I got this
resolved using a KB article.

Could I have a residual problem with permissions to use my network??

Motherboard has two onboard lan connections, both are affected, but a dial
up connection works without problem.

Running SP1 at the moment, but have tried a system restore to before the
problem, and before SP1 ( I don't think they are related), but no success
with that.

Norton Security 2008 removed, firewall disabled, ran Norton removal tool
also, so I am fairly sure it isn't a firewall issue?

Any suggestions would be gratefully received, else it is time to reinstall-
I have a full backup on my Windows Home Server, but I tried to reinstall from
that, but it doesn't seem to see the server over the network either, so that
isn't an option. I also tried to assign a static ip outside the range of the
router, but this doesn't allow me to ping anything else. Surely it can't be a
double hardware failure on the motherboard could it??

Please, will try anything,

Thanks in anticipation,,

Ian
 
Try these:

1. Disable IPv6 on Vista.
2. reboot it with clean boot.
3. Reset router.

Please post back with the result.

Vista IPCONFIG and Network SettingsHow to disable Auto-tuning on Windows
Vista · How to disable TCP/IPv6 · How to remove IPv6 and Tunnel completely
on Vista ...
www.howtonetworking.com/vista/vistaipconfig.htm


Windows generalHow to run Windows OS with a clean boot · How to Run Windows
Safe Mode with Networking · How to setup DHCP for IP Phone How to sort
programs in Start ...
www.howtonetworking.com/Windows/windowsgeneral.htm

--
Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on
http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on
http://www.HowToNetworking.com
 
Help!!

I have Ultimate edition, which until last week was happily connecting to a
Belkin router, and was set to get an ip address automatically. Now it never
gets one. I have done the obvious- changed cables, router ports, uninstalled
and reinstalled drivers, but just keep getting the same "Unidentified
network, limited connectivity", and an APIPA private made up IP address. I
have tried everything I know to try. Found a KB article about using DHCP in
administrative tools to set the scope of the ip addressing, but this doesn't
detect any router anyhow. Connecting my laptop to the same cable almost
instantly gets it an ip address.

I am beginning to look at a full reinstall, unless anyone can give me any
advice.

May not be related, but I recently seemed to lose the C\Windows\temp folder,
which caused a problem with opening stuff requiring UAC, but I got this
resolved using a KB article.

Could I have a residual problem with permissions to use my network??

Motherboard has two onboard lan connections, both are affected, but a dial
up connection works without problem.

Running SP1 at the moment, but have tried a system restore to before the
problem, and before SP1 ( I don't think they are related), but no success
with that.

Norton Security 2008 removed, firewall disabled, ran Norton removal tool
also, so I am fairly sure it isn't a firewall issue?

Any suggestions would be gratefully received, else it is time to reinstall-
I have a full backup on my Windows Home Server, but I tried to reinstall from
that, but it doesn't seem to see the server over the network either, so that
isn't an option. I also tried to assign a static ip outside the range of the
router, but this doesn't allow me to ping anything else. Surely it can't be a
double hardware failure on the motherboard could it??

Please, will try anything,

Thanks in anticipation,,

Ian
Click to expand...
I had similar problem. Everything working OK then suddenly computer
would not find DHCP (Unidentified Network, Default 169.xxx.x.x).

I tried different cables, ports, modem. without sucess.
Strange thing was that if another device was connected to switch (4
port ADSL Modem Router) and modem was reset the computer would find
DHCP.

I eventually fixed it by removing Comodo Firewall.

That had worked Ok until latest update.

Now works Ok except that accessing DHCP takes so long that Email
program that starts automatically from Startup folder fails to connect
to ISP the first time.
When it gets around to its automatic checks it works OK ( Checks every
10 to 30 Mins depending on Mail Box)

I now rely on Widows Firewall until I can find something that works


DJT
 
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