无法使用conda安装anaconda软件包

Question

我正在尝试使用conda install -c conda-forge keras安装keras
但我总是遇到以下错误，有人可以帮忙吗？

 Executing transaction: failed
    ERROR conda.core.link:_execute(502): An error occurred while uninstalling packag
    e 'defaults::conda-4.5.4-py36_0'.
    PermissionError(13, 'Access is denied')
    Attempting to roll back.

    Rolling back transaction: done

    PermissionError(13, 'Access is denied')