PC keep on rebooting by itself

Rebooting may be due to over heating,check the CPU and all other fans to make sure that they are performing properly,this includes the power supply fan also

1. Could be bad ram. Check your current ram stick or sticks with new ram.
2. Could be an overheating cpu. Check your systems motherboard web site for a system monitoring program that will tell you what your cpu temp is and track system problems.
3. Could be bad power supply.
4. and one more which I know you don't want to hear is (VIRUS) run a virus scan on the system to check for viruses.

Hope that helped

if not related to faulty h/w.
at which point of time does your pc reboot?
post screen? window screen? or a particular command that you run?

what is the os? if xp or 2k, you may like to try last known status.
any recent installed programs? (h/wincluded)

reboot has many causes.

This question was closed by the author