Hi, I've got a problem with my PC freezing - it just freezes randomly every 40-60mins or so for about 3-4 minutes and then unfreezes again. Sound stops, can't move my mouse. Diode on the case is suggesting that hard drive also stops working. As I have 3 hdds, I thought it's the drive issue as the system was running on the 5 or 6 years old drive. I reainstalled my system to the relatively fresh drive (about 2 y.o) with cleaning all the drives by the way, but nothing has changed. What can be the issue? Memory? CPU? Motherboard? Or a power supply?