Windows Firewall 'appears' to close on connection to network

[MiniEmma]

I have a wireless network to my PC (XP Pro SP2) and it works fine

But today I brought the PC downstairs and plugged it in with a network cable
to the router (D-Link DSL-G604T) and immediately the Security Centre pops up
with 'Your compter may be at risk' and shows the firewall as OFF so I click
for the Security Centre to enable and it says...

"the security center could not turn on windows firewall" and recommends
trying to turn it on myself through the Control Panel and Windows Firewall

I go to control Panel > Windows Firewall and it shows as ON ??!!

As soon as I unplug the network cable the problem goes away

Other PC on the network (also XP Pro SP2) works fine with cable plugged in
permanently

 

[MiniEmma]

I have a wireless network to my PC (XP Pro SP2) and it works fine

But today I brought the PC downstairs and plugged it in with a network
cable to the router (D-Link DSL-G604T) and immediately the Security Centre
pops up with 'Your compter may be at risk' and shows the firewall as OFF
so I click for the Security Centre to enable and it says...

"the security center could not turn on windows firewall" and recommends
trying to turn it on myself through the Control Panel and Windows Firewall

I go to control Panel > Windows Firewall and it shows as ON ??!!

As soon as I unplug the network cable the problem goes away

Other PC on the network (also XP Pro SP2) works fine with cable plugged in
permanently

Problem Solved

reset firewall to dafualts on the firewall 'advanced' tab