I am currently upgrading my Celeron 1.7GHz to a Pentium 4 2.4 GHz. I run Windows 2000 Pro on an MSI motherboard. 350 watt power supply. 1 gig of ram. When I start up my computer with the P4 in it, the comp acts like its struggling to process information. And it gets worst when I start up Windows. It runs sooo slow that the icons or start bar doesn't show up, in fact, my mouse doesn't even move! If anyone could help me with my problem that would be great. thanks!