2 networks, can't dhcp on one.

  • Thread starter Thread starter ZenMasta
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ZenMasta

Hi I don't use vista but I'm trying to fix my nephews friends laptop.
Besides some adware that's on it, it doesn't connect to the network/internet
like a non spyware infested pc usually does. I've got limited experience
with vista. My dad has a laptop with home premium but it was plug and play
to get it on the web and do file sharing with winxp computers.

So that's why I'm confused about this computer and why it can't plug and
play into the network. We have 2 networks in this house

LAN A: SBC DSL shared via linksys router. 3 windows xp computers.
LAN B: DSL Extreme shared via hub (DHCP through ISP) I get 5 ips. I do not
need to configure my pcs to get an ip they just work. I have 2 pcs, xbox 360
and dish dvr on the network. Everything works great.

When I connect the laptop to LAN A, I can't hit the web. I typed ip config
and found that I can't get an ipEthernet adapter Local Area Network... but
it just has the generic ip because it can't actually get one 168.254.104.12
subnet 255.255.0.0

If I type ipconfig /renew it says
An error occured while renewing interface Local Area Connection: unable to
contact your DHCP server. Request has timed out.
If I connect the laptop to LAN B, it gets an IP no problem and I can surf
the web and download or whatever.

How come I can't get dhcp on the SBC DSL via routers dhcp but I can on my
non router isp. He has brought his computer over on previous visits and was
able to connect no problem.

when I typed ipconfig I noticed there were 11 Tunnel adapter Local Area
connections. they all say media disconnected. I don't know what those are,
and how do I get rid of them (or should I)?
 
ZenMasta said:
Hi I don't use vista but I'm trying to fix my nephews friends laptop.
Besides some adware that's on it, it doesn't connect to the network/internet
like a non spyware infested pc usually does. I've got limited experience
with vista. My dad has a laptop with home premium but it was plug and play
to get it on the web and do file sharing with winxp computers.
Click to expand...

(snip long information about network)

There is no point in even discussing your network as long as this
computer has "some adware" on it. One of the most prevalent reasons for
problems with Internet connectivity for Windows machines is
virus/malware infection.

This machine should be completely cleaned up and *then* you can deal
with getting it on the Internet. As long as it is not clean, you don't
*want* it on a LAN or the Internet anyway. Since you don't have
experience with Vista, see the suggestion in the Standard Disclaimer
below to have a professional look at it.

Go through these general malware removal steps systematically -
http://www.elephantboycomputers.com/page2.html#Removing_Malware

Include scanning with David Lipman's Multi_AV and follow instructions to
do all scans in Safe Mode. Please see the special Notes regarding using
Multi_AV in Vista.

http://www.elephantboycomputers.com/page2.html#Multi-AV - instructions
http://www.pctipp.ch/downloads/sicherheit/35905/multi_av_scanning_tool.html
- download site

The site is in German but David's tool is in English so don't let that
worry you. Scroll all the way down to almost the bottom of the page and
you'll see a box titled "Infos Zum Download - Multi-AV Scanning Tool".
You'll see "Download von www pctipp.ch" and the live link to download
Multi_AV.

You can also check to see if there are targeted removal steps for your
malware here:
Bleeping Computer removal how-to's -
http://www.bleepingcomputer.com/forums/forum55.html

When all else fails, run HijackThis and post your log in one of the
specialty forums listed at the first link above (not here, please).

Not all tools used will work in Vista and you will need to run them
elevated. If you are unable to remove the infection by following the
general steps, register at one of the HijackThis forums as suggested.

Standard disclaimer: I can't see and test your computer myself, so these
are just suggestions based on many years of being a professional
computer tech; suggestions based on what you've written. You should not
take my suggestions as a definitive diagnosis. If you can't do the work
yourself (and there is no shame in admitting this isn't your cup of
tea), take the machine to a professional computer repair shop (not your
local equivalent of BigComputerStore/GeekSquad). Please be aware that
not all local shops are skilled at removing malware and even if they
are, your computer may be so infested that Windows will need to be
clean-installed. If possible, have all your data backed up before you
take the machine into a shop.


Malke
 
Shortly after posting I removed the malware with hijack this and combofix. I
still have the same problem
 
Oh, I forgot to add. If I set the give it a static IP he can connect just
fine. Problem with that though is I'm concerned he'll have problems when he
goes home and I can't help him there. One thing I noticed when changing
between lan A/B was it woudl say connected to network 3 or connected to
network 4. Hopefully this means he's got a network 1 and 2 at home that will
work fine.
 
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