winxp sp2 install broke my network

Hi,
I just installed win xp sp2 on my laptop and now my wireless network stopped
working. I cannot connect to my other computer in the network nor connect to
the internet. Status of network connection to the laptop seems ok since all
info I can see from my Netgear admin program indicates a good connection. I
have also disabled the xp-firewall. I have no other firewall except in the
router. I have a standalone pc connected to the network (winxp sp1) and this
one is working ok i.e. have access to the internet. The standalone pc cannot
see the laptop on the network. What should I check?

Thanks for any help.
/Magnus