HikVision NVR Crashing

I have a new HikVision 6 Cam system that works well for about 8 hours, then the NVR crashes loosing all video streams.
A hard reboot (unplug/replug) usually brings everything back on line. The Kit is Model EK1-Q82T46 and the NVR is ERI-Q108-P8, purchased in September in USA. The NVR Firmware is V3.4.96Build180324 and when I try an on-screen update, it tells me that there is no Firmware update available.
The system looses video to a direct attached TV, to the iVMS-4200 software and...

HikVision NVR Crashing