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Discussion Starter · #1 ·
A co-worker got a virus on his computer. I was able to remove it but, after running ComboFix, it 'broke' his Windows. It seems he was running a hacked copy, and ComboFix deleted a dll file it wanted. Signs of the virus were still present, so I decided to give him a legit OEM XP license that I had as a spare and reformatted to install from scratch. Things were going well until I installed SP3, after which the Internet stopped working. JUST the Internet. So I putted around with it for a bit, couldn't find anything, and wound up reinstalling XP again.

No dice. Right from the get-go it seemed like it was having serious issues keeping it's DNS settings properly. But after puttering around some more and trying almost EVERY trick in the book, the issue was still intermittent. Sometimes it would come on by itself, most times it wouldn't. Flushing and re-registering the DNS cache would sometimes work... WinSock fixes did nothing. All this time the IP numbers are SOLID, and every other machine on my network works great except for this one, so it's not a router issue. I can ping every machine on my internal network, including the gateway, but outside Web addresses are hit and miss, even when using their IP addresses.

Running the 'Repair Connection' doesn't work. The ONLY thing that seems to solve the issue consistently is to disable and reenable the network adapter in software. I don't think the owner of this PC will be tolerant enough to do that. Any ideas?
 

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Re: Weird DNS Issue

Hi Troy_Jollimore,

I am assuming you tried this but try updating the network card drivers if you haven't yet. Also have you tried performing a ipconfig\release and ipconfig\renew? If not, try that. Hopefully this will help you out.
 

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Re: Weird DNS Issue

After doing what DBCooper suggested and update the Network Adapters drivers, go to Start/Run and type CMD and press enter. In the Command Prompt type ipconfig /all and press enter. The DHCP Server, DNS Server and Default Gateway should all have the same IP Address (the Gateway/Router). Still in the Command Prompt type ipconfig /release and press enter. the IP address turns to 0.0.0.0. Now type ipconfig /flushdns and press enter. Now type ipconfig /renew and press enter. Now type ipconfig /all confirm that there is a new IP address and the Gateway, DNS Server, and DHCP server all have the same address.
 

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Discussion Starter · #4 · (Edited)
Re: Weird DNS Issue

...trying almost EVERY trick in the book...
Definitely covered both of those suggestions early on. No dice. Granted, the adapter is a 'Via Rhine II' on-board, so when I get a second I'm going to throw in a card and see what happens. Now it seems that even disabling and re-enabling the adapter doesn't solve the issue every time, although if it fails the first time it'll usually do the trick the next time I try.

The one area I deviate from with your IP numbers is DNS. I don't have an internal one (yet), and I run a Cisco PIX501 as our Firewall/Router. I don't think it has much for DNS, although it is serving DHCP for the moment. My two DNS settings are an external one, and one at my ISP. They work great for every other machine on the network.

It's just THIS one...Until the adapter is 'kicked', it's like all traffic hits the gateway and just...stops. It's not solely DNS, either. When it's in full 'not working' mode, even typing an external IP address gets no response. My internal network IPs work fine.

Edit: Just to satisfy your curiousity...

IP Address: DHCP (currently 192.168.1.243) or Static (192.168.1.13)
NetMask: 255.255.255.0
Gateway: 192.168.1.181 (Also DHCP Server)
Pri DNS: 139.142.2.3 (I've tried a few others
Sec DNS: 10.10.10.10 for primary and secondary)

It's working at the moment. Running Windows Update.
 

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Re: Weird DNS Issue

Definitely try a new adapter card, this will most likely solve this issue. Make sure you disable on-board LAN in BIOS
 

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Discussion Starter · #6 ·
Re: Weird DNS Issue

Haven't gotten back to trying that yet, but now it seems that it's time-based. Network functionality is available immediately, but DNS-related operations seem to take a few minutes to kick in. I've never encountered that before. It 'seems' to have improved with the installation of Windows SP3 and updates, but I say 'seems' because I have been too busy to sit right by it when it reboots.

I'll try to remember to fill in more when I focus back on it.
 

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Discussion Starter · #7 ·
Re: Weird DNS Issue

After doing all of the Windows updates, the issue seemed to resolve itself.

I put a second (newer) machine up on my test bench, and it had the same issues! Again, it seemed to resolve itself after all the newer Windows updates had been performed. However, this behaviour had never happened before when either machine was first set up.
 
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