Your CPU should be OK. It looks like there is a bug in PyTorch, but I am not sure which PyTorch version you are using.
Please try the following. First fully uninstall PyTorch:
conda uninstall -y pytorch-cpu
conda uninstall -y pytorch

Next try the nightly CPU build from yesterday:
pip install https://download.pytorch.org/whl/nightly/cpu/torch_nightly-2018.8.14.dev1-cp36-cp36m-linux_x86_64.whl

Please let me know if this works.