one computer will not connect to router

  sp1 17:06 26 Mar 2005
Locked

Hi, i am having a nightmare with my computer and hope someone may be able to help.
I have a BT voyager 2100 modem/router which replaced my Alcatel USB modem (green stingray type)my isp is wanadoo.
My desktop is running XP and i had to fit a
Linksys 10/100 lan card as it did not have an ethernet connection,my son's desktop is running XP and has a BT 1040 pci adapter fitted,my laptop is running XP+SP2 has a BT 1060 laptop adapter fitted and finally my wife's laptop is running XP+sp2 and is wifi.
When i had set everything up and was ready to connect to the router my desktop would not connect to 198.168.1.1,i followed all the instuctions in the kit and double checked them but to no avail,i then tried with my laptop and no problem,i entered my broadband user name and password and could connect to the net no problem (bt broadband)so could my son and my wife but my desktop still wii not!
When i go to network connections it shows local area connection enabled (linksys lne100tx fast ethernet adapter)and when i go to status it shows status as connected,speed 100.0Mbps but it still will not connect!!
I have disabled dial up connections and in LAN settings the auto detect settings box is checked,in internet protocol (tcp/ip)properties it is set to obtain ip address and dns server automatically
Please someone help me before i lose the plot all together
Thanks

  spikeychris 17:18 26 Mar 2005

Make sure you disabled all firewalls on the desktop first then try and ping one of the other machines on the network.

  sp1 17:25 26 Mar 2005

Hi, McAfee firewall is disabled are there any other firewalls in Xp that i don't know about?
And how do i "ping" another computer?
Thanks

  spikeychris 17:35 26 Mar 2005

Go to one of the other machines and type cmd into run. Type ipconfig into the command prompt. Make a note of the IP address, it will be 192.168.1.*

Go back to your machine and type cmd into run then type ping 192.168.1.* [the asterisk will be the last number of the IP address]

Post the results.

  sp1 17:49 26 Mar 2005

Tried to ping my laptop from desktop,results as follows
Pinging>with 32 bytes of data
Destination host unreachable
" " "
" " "
" " "
Ping statistics
Packets: sent=4,received=0,lost=4 (100% loss)

  spikeychris 17:56 26 Mar 2005

Can you ping your local host on the desktop? Do the same as above but type 127.0.0.1

  sp1 18:11 26 Mar 2005

Pinged 127.0.0.1 with the following results
Reply from 127.0.0.1:bytes=32 time<1ms TTL=128
ping statistics Packets:sent=4,received=4,lost=0 (0% loss)

  spikeychris 18:19 26 Mar 2005

Just to make sure: Type ping [space] then type loopback

Post result

  sp1 18:27 26 Mar 2005

Tried ping loopback,same results as pinging 127.0.0.1

  spikeychris 18:33 26 Mar 2005

Failure to ping 127.0.0.1 is probably caused by an improperly
configured firewall program. Un-install McAfee and try again.

  sp1 18:36 26 Mar 2005

What should i see when i ping 127.0.0.1?

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