Yes, I know. I just want to ensure torch is uninstalled. Using pip uninstall is harmless since it will ask for your confirmation. If you ensure the package is completely removed, then it is likely that the package you downloaded is incomplete or broken. Please remove the cache file in [Anaconda Root]\pkgs and try again. Alternatively, you can download the file from https://anaconda.org/pytorch/pytorch-nightly/files 9 and install it locally.