Windows XP and MN710 Base Station

I am experiencing problems with my PC locking up at what
is deemed no particular reason. There are two computers
on the network. Mine is the wireless one. The other
computer is also running XP with SP2 and has no problems
as it is directly wired to the router. The only
conclusion I can draw is that when my husband goes to the
internet (no particular site, service or game) my
computer locks up/freezes and won't recover. I have to
reboot. Any suggestions? I am running XP w/ SP2, P4 1.6
Gig processor with 256 MB Ram. This only happens when we
are both on the web at the same time. Both running IE 6.0
with latest service updates. Oh, and don't forget the
lovely windows firewall. No other firewalls installed at
this time. Any help would be great! Thanks!