anaconda输入更新命令：conda upgrade --all后，出现如下错误：
The following packages will be UPDATED:
conda: 4.5.4-py36_0 --> 4.5.5-py36_0
Proceed ([y]/n)? y
Preparing transaction: done
Verifying transaction: done
Executing transaction: failed
ERROR conda.core.link:_execute(502): An error occurred while uninstalling package 'defaults::conda-4.5.4-py36_0'.
PermissionError(13, '拒绝访问。')
Attempting to roll back.
解决方法：
C:\Users\xxx> 中的xxx不是管理员，或者说就是权限不够；
在conda在的路径里，......\Anaconda3右击属性->安全->user选中现在的用户，修改权限至所有权限；
重新打开命令行，即可。
anaconda输入更新命令：conda upgrade --all后，出现如下错误：The following packages will be UPDATED:conda: 4.5.4-py36_0 --> 4.5.5-py36_0Proceed ([y]/n)? yPreparing transaction: doneVerifying transaction: done...
anaconda
使用canda安装包时，报错如图：
ERROR conda.core.link:_execute(502): An error occurred while uninstalling package 'defaults::numpy-base-1.15.1-py37h8128ebf_0'.
PermissionError(13, '
拒绝访问
。')
解决方法：
以管理员方...
Executing transaction: failed
ERROR conda.core.link:_execute(502): An error occurred while uninstalling package 'defaults::conda-4.5.11-py37_0'.
PermissionError(13, '
拒绝访问
。')
Attempting to roll back.
Rolling back transaction: don
ERROR conda.core.link:_execute_actions(337): An error occurred while installing package 问题解决办法
ERROR conda.core.link:_execute_actions(337): An error occurred while installing
package 'defaults::tqdm-4.46.0-py_0'.
CondaError: Cannot link a source that does not exist. D:\anac...
包下载网站：https://
anaconda
.org/
超详细教程，教程1，教程2，教程3
安装时如果选择为所有用户安装，则启动
Anaconda
Prompt时要以管理员身份启动，避免管理包时报权限
错误
：
Preparing transaction: done
Verifying transaction: do...
