Just built Intel Pentium Dual Core 820, MSI 945P Platinum motherboard, 1G DDR2 memory, 128M NVidia video, 160G SATA drive. XP Pro locks up in about 2 minutes after boot even if I do nothing. UPDATED all drivers and removed all hardware except cpu,memory,video, and disk. BIOS setup with fail-SAFE defaults. Computer does not lock up in safe mode. How do I determine what is the problem?WCM:

Check for overheating: Is the heatsink firmly connected to the processor and did you use plenty of heatsink grease (if required)?  Does the heatsink require a fan?  Is the power supply fan and any case fan spinning properly?  

Check for overtaxing the power supply: Do the demands of all the hardware devices exceed the wattage output of the power supply?  If so, install one with a higher wattage output capacity.  

DocI think I found it. I turned off all of the startup programs and by PROCESS of elimination it turned out to be the MSI Core Center that monitors the temp, etc. I uninstalled it and everything works fine. I installed MSI PC Alert 4 and when I turn it on it locks up. I guess trying to monitor the temp CAUSES a problem.