Great news! PyTorch now is supporting Windows!
If you have a PC with suitable Nvidia graphics card and installed CUDA 9.0 and Anaconda, type the following commands;
conda install pytorch cuda90 -c pytorch
pip3 install torchvision
It is about 500 MB, so be patient!

Underline is the old post.
PyTorch is a deep learning framework that puts Python first. Currently, it only supports MacOS or Linux.