I am not sure how to solve this problem, i have formatted my computer, and replaced a faulty network card. When i am running internet explorer 7.0 and outlook 2007, my computer locks up or stops responding when i click between the two. I have to pull the plug to turn it of since Task manager appears, but i cant click on anything. I have P4 3.4 GHZ with 2 gigs of ram. I still can't solve the problem, i have removed programs i dont use from the start up list. I can't figure out where the problem is occuring or how to fix it. The system becomes unresponsive. Is there a program that can spot conflicts?