Are you getting bsod's w/memory errors ? Stuff like o/e error @ cfffff whatever ?
CFS2 is a memory PIG, you may wish to try some vcache setting to resolve this, used to happen to me alot.

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pIII 850, Soyo SY-6BA+100, 425w psu, 512m Corsair RAM, Maxtor HDD's {RAID}, Abit Siluro GF2 64m w/12.40 drvs., Hercules Game TheaterXP w/Monsoon MM-700's {2 sets}, Logitech Goodness.