If I leave NL unattended and running for more than 30 minutes or so my system freezes.
Its very odd because there is not usually any bluescreen error. (Only when I was downloading to my system drive did I get a blue screen error, it was):
I have traced this error to this problem:
0xC000009D, or STATUS_DEVICE_NOT_CONNECTED: bad cabling, non-termination, or the controller is not able to obtain access to the hard disk.
Perhaps NL is being a bit greedy with disk i/o on fast systems.