New PC can't join network. Problem?

[Guest]

I have two wireless XP Home SP2 laptops (both identical Compaqs, actually)
and one wired XP Pro Desktop. All computers are connected to a Belkin
Wireless G Router, connected to a cable modem. I initially had my desktop and
my girlfriend's laptop on the network, and everything worked. Then, my
parents got an identical laptop, and tried to connect to the network. They
have internet, so the DNS and DHCP are
working correctly, and the new laptop can ping the other computers and the
gateway, but cannot ping itself. The other computers time-out when they try
to ping the new laptop. I made sure the workgroup name is the same and the
SM is the same. The other two computers can still communicate and browse the
network/internet, so there are no conflicts. Also, the new computer can't
access the workgroup when I go to view workgroup computers. What could be
the issue?

 

[yankeefan62]

I have two wireless XP Home SP2 laptops (both identical Compaqs, actually)
and one wired XP Pro Desktop. All computers are connected to a Belkin
Wireless G Router, connected to a cable modem. I initially had my desktop and
my girlfriend's laptop on the network, and everything worked. Then, my
parents got an identical laptop, and tried to connect to the network. They
have internet, so the DNS and DHCP are
working correctly, and the new laptop can ping the other computers and the
gateway, but cannot ping itself. The other computers time-out when they try
to ping the new laptop. I made sure the workgroup name is the same and the
SM is the same. The other two computers can still communicate and browse the
network/internet, so there are no conflicts. Also, the new computer can't
access the workgroup when I go to view workgroup computers. What could be
the issue?

Do you have a firewall set-up? I racked my brain for days when
something similar happened to me, tore it all down and started it back
up, and it was just my software firewall. Once I configured it to
recognize other computers, NAS, and print server, everything was fine.

 

[Guest]

I actually don't have a firewall active. I had the Windows Firewall active,
but I had to deactivate it, and it was deactivated when I tried to integrate
the third computer. I know I don't have Norton or anything like that
installed, and avast! doesn't have a firewall. Is there anything else that
could cause that?