Clive, are you running this in a Virtual Machine? What is the output of cat /proc/cpuinfo?
I am looking to see if there is atleast SSE4 support. PyTorch binaries ship with SSE, SSE2, SSE3, SSE4 assembly instructions. SSE4 itself is quite an old standard with processors dating many years supporting it, so we didn’t think it was a problem. However, I wonder if your machine supports it.