However, if the problem seems random, or if the memory location the error message cites as having failed seems random, I would suspect improper power as the culprit. The following is a list of PC problems that often are related to the power supply:
Any power-on or system startup failures or lockups.
Spontaneous rebooting or intermittent lockups during normal operation.
Intermittent parity check or other memory-type errors.
Hard disk and fan simultaneously failing to spin (no +12v).
Overheating due to fan failure.
Small brownouts cause the system to reset.
Electric shocks felt on the system case or connectors.
Slight static discharges disrupt system operation.
Many types of symptoms can indicate problems with the power supply. Because the power supply literally powers everything else in the system, everything from disk drive problems to memory problems to motherboard problems can often be traced back to the power supply as the root cause.
Regardless of your issue, any power supply that comes with the case unless requested will come with a very cheap power supply. I would recommend buying a good power supply, your PC will thank you for it. A poor power supply can shorten the life span of other components.