Still struggling with this problem. Have checked all the hardware, but ESXI still completely freezes/stops. Can't F2/Alt-F2 on the console. No log entries at the time the freeze occurs. Is there any way I can troubleshoot this with ESXI? Read that a serial port connection might be used?
I have been having the same problem. Have tried many things. I don't have a confirmed solution yet, but someone on reddit recently told me they were seeing th esame issue when they had any networks using the vmxnet3 adapter. Try changing it maybe? I changed mine and can update in a few days if the hard locking stopped. Best of luck.