A. This problem is probably the result of a conflict between the Cache Manager and the Memory Manager. The problem worsens when you enable write-back cache in BIOS. The solution involves trial and error. First, disable write-back cache (you'll simply need to accept the performance loss). Also, be certain to use NT 4.0 Service Pack 5 (SP5) or later (I prefer SP6a). If the problem persists, try using Windows 2000 Server; Microsoft has improved thread management in that OS.