Windows keeps crashing

[r_swithenbank]

After running windows for a while my computer crashes and then resets itself and then will constantly reset itself before it gets a chance to load windows again and carries on doing this untill i reinstall windows, but then it will only be a matter of time before it does it again. I have updated all my drivers and bios but still no joy.
Help me

[Momoman907]

After running windows for a while my computer crashes and then resets itself and then will constantly reset itself before it gets a chance to load windows again and carries on doing this untill i reinstall windows, but then it will only be a matter of time before it does it again. I have updated all my drivers and bios but still no joy.
Help me
Anytime yo have a problem such as this it helps if you post your system specs. And if there is anyway for you to post your CPU and MOBO temps would also help.

[r_swithenbank]

Anytime yo have a problem such as this it helps if you post your system specs. And if there is anyway for you to post your CPU and MOBO temps would also help.

Sorry bout that MB: matsonic ms8137c+, athlon 2000xp, 512ddr ram, radeon 7500le, soundblaster 5.1 digital.
cpu temp: bout 48c
mb temp: bout 30c

[NooNoo]

48C is measured from the bios?

If that's an idle temp - that is your problem, as soon as the cpu is asked to work it will go up 20C easy....

who put the heatsink on the cpu?