[Thermodyne]

Boot to bios and see what the FSB is set to. If it is the same as the CPU rating, then check the memory. If the memory is at rated buss speed and the timings are not altered look at the vidio card. If it is set to default, nothing is OC'd. If the system is OEM like Dell or Compaq, it is not OC'd.

If you want to see what you have, DL and run Sandra. It will show you what the system has under the hood and let you run some bench marks.

Many games need patches to make them run stable. SE4 was a real PITA until the first patch.