How's your system working now?
Seems to be ok.
How? From where? 
Setting up the Win XP Firewall
From the Control Panel
Click 'Network & Internet Connections',
Click 'Internet Properties',
You will see a list of connections you use to connect,
right click on the connection you want to protect,
from the dropdown menu click 'properties'
from the diolog box click 'advanced' button at the top menu, the next screen - check the box that
says 'enable firewall', then click the settings button at the bottom of that diolog box.
you guys can take it from there.
Ilya