just one small concern, which only happens with clean install and updating. install anti-virus before running windows update at all. a friend had a problem with a virus hitting his comp every time he went to update from a clean install, until he denied any inet connection until after installing anti-virus. but as for sp2, never a problem, other than the danged security center pop-ups cause of turning off windows firewall. and as spiritual pointed out, after a day or two even that stops.