HP desktop
P4 XP SP2
Motherboard: socket 478 (sorry thats only what i HEARD from the repair man)

so im getting confuse with this problem
when i came in the office, my pc its running, im sure that i shutdown it properly last night
it will not take LONG, and it will restart itself (properly shutdown, then start)
but later, when the restarting runs, it will not load the welcome screen it will restart again

im in the internet cafe as of now (for to log this)

we try to take out one by one from connection:
we take out first HDD (then we try to start, but still same problem)
then Floppy drive ..........(same problem)
then RAM..........(same problem)
then CD drive..........(same problem)
then we try to use another PSU but still same problem

only the proccessor and mother board is not yet check because we dont have extra (in the shop) same item

any idea which one is the problem? or where is the problem? or what is the problem?
need your kind assistance
thanks........
Can you start in safe mode?safe mode still same problem
there is a time (if there is luck) that it can run for 20mins, 30 or ALMOST 1hour but not exceed
so if i can get to safemode, i must do?
Seeker:

It could be a problem with overheating. Check the case FANS, power supply fan, and any CPU fan to make sure they are all spinning and there is no dust blocking the vents. Check the CPU temp if your motherboard BIOS has this feature. If you added the processor yourself, make sure you used enough heatsink grease and that the heatsink is firmly connected to the processor.

DocQuote

Seeker:

It could be a problem with overheating. Check the case fans, power supply fan, and any CPU fan to make sure they are all spinning and there is no dust blocking the vents. Check the CPU temp if your motherboard BIOS has this feature. If you added the processor yourself, make sure you used enough heatsink grease and that the heatsink is firmly connected to the processor.

Doc