I have an E machine T2040 desktop that I want to upgrade with a p4 3.0 Prescott 800 FSB HT . I have replaced the motherboard in the past with a MSI Pm8M-V that is suppose to support the cpu I am trying to install. The current cpu that came with the machine is a cleron 2.0 that currently works fine, also upgraded was the power supply to Echo Star 600 watt power supply, Geforce Fx 5200 256 MB DDR video card, 2 Samsung 512 Mb DDR ram , the os running is the factory installed windows xp. The problem I am having is when I install the p4 and turn on the computer everything works fine it boots up and says new hardware found to properly install computer must be restarted. If I continue to use it every thing works fine it sees the new cpu and recognized the ht tec. When its restarted it won’t reboot to windows, I can reboot in safe mode only. I have done a windows repair and still having the same problem.