Is it practical to have both norton internet security & windows xp pro security sys. on at same

No, you should only use one. Use either Norton or Windows security. You stand a higher chance of picking up malicious things when running both; as crazy as that sounds.

Is it practical to have both norton internet security %26amp; windows xp pro security sys. on at same time ?/?microsoft windows xp

you only run one firewall

Is it practical to have both norton internet security %26amp; windows xp pro security sys. on at same time ?/?ie 7 internet explorer

NO run only One