Hi
I have a conventional home network- a 4 port wireless ADSL router connects 
via several switches to various PCs all running Windows XP.
All was working fine until recently, when one PC finds itself unable to 
connect to the internet.
It can browse network shares on other PCs, but cannot ping any internet 
addresses, nor even the router (configured as 192.168.0.1 in my setup).
Looking at the post above (problem with dual network ports) I may have a 
similar problem, so here is the ipconfig /all and route print output:


Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\*******>route print
===========================================================================
Interface List
0x1 ........................... MS TCP Loopback interface
0x2 ...00 00 00 00 00 00 ...... SiS 900 PCI Fast Ethernet Adapter - Packet 
Sched
uler Miniport
0x3 ...00 d0 5c 20 5b 3b ...... Hauppauge WinTV NOVA Adapter - Packet 
Scheduler
Miniport
===========================================================================
===========================================================================
Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
          0.0.0.0          0.0.0.0      192.168.0.1     192.168.0.3       20
        127.0.0.0        255.0.0.0        127.0.0.1       127.0.0.1       1
      192.168.0.0    255.255.255.0      192.168.0.3     192.168.0.3       20
      192.168.0.3  255.255.255.255        127.0.0.1       127.0.0.1       20
    192.168.0.255  255.255.255.255      192.168.0.3     192.168.0.3       20
     192.168.44.0    255.255.255.0    192.168.44.21   192.168.44.21       20
    192.168.44.21  255.255.255.255        127.0.0.1       127.0.0.1       20
   192.168.44.255  255.255.255.255    192.168.44.21   192.168.44.21       20
        224.0.0.0        240.0.0.0      192.168.0.3     192.168.0.3       20
        224.0.0.0        240.0.0.0    192.168.44.21   192.168.44.21       20
  255.255.255.255  255.255.255.255      192.168.0.3     192.168.0.3       1
  255.255.255.255  255.255.255.255    192.168.44.21   192.168.44.21       1
Default Gateway:       192.168.0.1
===========================================================================
Persistent Routes:
  None

C:\Documents and Settings\******>ipconfig /all

Windows IP Configuration

        Host Name . . . . . . . . . . . . : tvserver
        Primary Dns Suffix  . . . . . . . :
        Node Type . . . . . . . . . . . . : Unknown
        IP Routing Enabled. . . . . . . . : No
        WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection 3:

        Connection-specific DNS Suffix  . :
        Description . . . . . . . . . . . : SiS 900 PCI Fast Ethernet 
Adapter
        Physical Address. . . . . . . . . : 00-00-00-00-00-00
        Dhcp Enabled. . . . . . . . . . . : Yes
        Autoconfiguration Enabled . . . . : Yes
        IP Address. . . . . . . . . . . . : 192.168.0.3
        Subnet Mask . . . . . . . . . . . : 255.255.255.0
        Default Gateway . . . . . . . . . : 192.168.0.1
        DHCP Server . . . . . . . . . . . : 192.168.0.1
        DNS Servers . . . . . . . . . . . : 192.168.0.1
        Lease Obtained. . . . . . . . . . : 14 September 2009 08:47:03
        Lease Expires . . . . . . . . . . : 14 September 2009 09:17:03

Ethernet adapter Local Area Connection 4:

        Connection-specific DNS Suffix  . :
        Description . . . . . . . . . . . : Hauppauge WinTV NOVA Adapter
        Physical Address. . . . . . . . . : 00-D0-5C-20-5B-3B
        Dhcp Enabled. . . . . . . . . . . : Yes
        Autoconfiguration Enabled . . . . : Yes
        Autoconfiguration IP Address. . . : 192.168.44.21
        Subnet Mask . . . . . . . . . . . : 255.255.255.0
        Default Gateway . . . . . . . . . :

The suspicious thing to my mind is the physical address of the NIC- reported 
as 00-00-00-00-00-00.
As you can see the PC has a DTV capture card (Hauppauge) which XP treats as 
a Network interface. AS I say, this has all been working fine till the other 
day, so I'm a bit stumped.
TIA for any help
Neil

On Mon, 14 Sep 2009 09:01:41 +0100, "Gripper"  wrote:

> The suspicious thing to my mind is the physical address of the NIC- reported 
> as 00-00-00-00-00-00.

To mine too.  I suggest you go to Device Manager and uninstall it, then
rediscover it with "scan for changes" and allow PnP to reinstall it.  Maybe
also download the latest drivers, although that's probably irrelevant as
the old ones were working fine once upon a time.

Tony

"Anthony R. Gold"  wrote
> On Mon, 14 Sep 2009 09:01:41 +0100, "Gripper"  wrote:
>
>> The suspicious thing to my mind is the physical address of the NIC- 
>> reported
>> as 00-00-00-00-00-00.
>
> To mine too.  I suggest you go to Device Manager and uninstall it, then
> rediscover it with "scan for changes" and allow PnP to reinstall it. 
> Maybe
> also download the latest drivers, although that's probably irrelevant as
> the old ones were working fine once upon a time.

Thanks for that- tried it- no joy.
I've plugged in a USB wireless dongle and the Internet is available 
straightaway, so it's definitely a problem with the NIC.
I updated the drivers for the NIC and still no joy.
I'm off to blag a PCI NIC, and I'll disable the mobo onboard NIC and report 
back
Cheers
Neil

"Gripper"  wrote
>
> "Anthony R. Gold"  wrote
>> On Mon, 14 Sep 2009 09:01:41 +0100, "Gripper"  
>> wrote:
>>
>>> The suspicious thing to my mind is the physical address of the NIC- 
>>> reported
>>> as 00-00-00-00-00-00.
>>
>> To mine too.  I suggest you go to Device Manager and uninstall it, then
>> rediscover it with "scan for changes" and allow PnP to reinstall it. 
>> Maybe
>> also download the latest drivers, although that's probably irrelevant as
>> the old ones were working fine once upon a time.
>
> Thanks for that- tried it- no joy.
> I've plugged in a USB wireless dongle and the Internet is available 
> straightaway, so it's definitely a problem with the NIC.
> I updated the drivers for the NIC and still no joy.
> I'm off to blag a PCI NIC, and I'll disable the mobo onboard NIC and 
> report back

Well, I just bunged in a cheapy NIC, disabled the onboard adapter and it 
works again !
How very strange that I could access the network from the PC, and vice 
versa, but absolutely no Internet access...
Anyway it's sorted, but I'd still love to know what the problem was !