unable to contact DHCP server

[Guest]

My desktop received malware attack and hung. I did system restore and got all
applications running again except Internet connectivity. I have DSL modem and
Verizon service. My laptop with XP works fine with modem and internet.
When I do ipconfig /all, the IP address shows 169.254.x.y and Subnet Mask is
255.255.0.0 showing that the Autoconfig IP address is working.
But the Default Gateway is blank
ipconfig /renew returns "An error occurred while renewing interface Local
Area Connection: unable to contact your DHCP server"
I have tried to repair the "winsock" registry (please bear with me if I
mis-name something, I'm no IP expert) and worked with the Verizon tech line
to no avail.
Any help will be appreciated, I've been working on this for 2 months now.
Thanks in advance.

 

[Chuck]

My desktop received malware attack and hung. I did system restore and got all
applications running again except Internet connectivity. I have DSL modem and
Verizon service. My laptop with XP works fine with modem and internet.
When I do ipconfig /all, the IP address shows 169.254.x.y and Subnet Mask is
255.255.0.0 showing that the Autoconfig IP address is working.
But the Default Gateway is blank
ipconfig /renew returns "An error occurred while renewing interface Local
Area Connection: unable to contact your DHCP server"
I have tried to repair the "winsock" registry (please bear with me if I
mis-name something, I'm no IP expert) and worked with the Verizon tech line
to no avail.
Any help will be appreciated, I've been working on this for 2 months now.
Thanks in advance.

Tim,

If you had a malware problem, and now you can't get DHCP settings, though
another computer has no similar problems, I'd almost certainly suspect LSP /
Winsock corruption. The fact that you may have attempted to repair Winsock,
with no success, isn't a denial of that theory.

Not knowing which Winsock repair you attempted, I'd suggest trying each in
sequence, as outlined in my article. Not one of the 5 possibilities has been
proven to be self sufficient, or more effective than any of the others.
<http://nitecruzr.blogspot.com/2005/05/problems-with-lsp-winsock-layer-in.html>
http://nitecruzr.blogspot.com/2005/05/problems-with-lsp-winsock-layer-in.html

 

[Guest]

Chuck, thks for quick response. I read your articles, downloaded and tried
fixes 1,2,&3 to no success. Found I have SP1 in both machines, then tried the
4 th fix, no luck. I am trying to determine which driver for the NVIDIA
nforce MCP Network Adapter to download. I'm not finding a 1:1 correspondence
between what I have and what I see on their web site.
Desktop is HP Pavilion735N about two years old. No additional boards
installed, no gaming software, no system tweaks, just plain vanilla workhorse
docs and spread sheet machine.

 

[Yves Leclerc]

You might try a different network cable. If this still does not work, I
would consider disabling the nForce Networek adapter and trying another
network adapter. You may be unlucky and the network port is "dead". If you
do not want to open up your PC, look at getting a USB to Ethernet adapter.

 

[Tony]

My desktop received malware attack and hung. I did system restore and got
all
applications running again except Internet connectivity. I have DSL modem
and
Verizon service. My laptop with XP works fine with modem and internet.
When I do ipconfig /all, the IP address shows 169.254.x.y and Subnet Mask
is
255.255.0.0 showing that the Autoconfig IP address is working.
But the Default Gateway is blank
ipconfig /renew returns "An error occurred while renewing interface Local
Area Connection: unable to contact your DHCP server"
I have tried to repair the "winsock" registry (please bear with me if I
mis-name something, I'm no IP expert) and worked with the Verizon tech
line
to no avail.
Any help will be appreciated, I've been working on this for 2 months now.
Thanks in advance.

How does the desktop connect to DSL? is it an Ethernet modem or USB? or do
you network to the laptop. 169.254.x.x means that your DHCP is not working
i.e. you are not getting an IP address from wherever (depending on your
setup it could either be your ISP or the laptop if you are connecting via
that).

To determine where to look for the fault depends on how you are connecting
to the internet.

..

 

[Chuck]

Chuck, thks for quick response. I read your articles, downloaded and tried
fixes 1,2,&3 to no success. Found I have SP1 in both machines, then tried the
4 th fix, no luck. I am trying to determine which driver for the NVIDIA
nforce MCP Network Adapter to download. I'm not finding a 1:1 correspondence
between what I have and what I see on their web site.
Desktop is HP Pavilion735N about two years old. No additional boards
installed, no gaming software, no system tweaks, just plain vanilla workhorse
docs and spread sheet machine.

Tim,

Well, LSP / Winsock / TCP/IP corruption was the best candidate. Now you have to
look for a problem not directly related to malware removal. Go thru your setup
from the bottom up, and examine each possibility.
<http://nitecruzr.blogspot.com/2005/08/solving-network-problems-tutorial.html>
<http://nitecruzr.blogspot.com/2005/05/troubleshooting-internet-service.html>