hi ive got a problem with my computer locking up it first started doing it while i was playing multiplayer games on internet but now its started doin it while running other applications such as windows media player and paint shop pro etc its seems to of got worse the past few weeks the only thing i have thats differnt is i installed a geforce 4 grafix card but surly this cant be the problem as its better than the intergrated one on motherboard when it locks up i cant use anything i have to restart the computer it never realy gets hot so i dont think its heat related i have asus a7n266-vm 2400 motherboard and its running on xp pro any help much appreciated thanks in advance