Windows命令无法运行报错：is not recognized as an internal

“command” is not recognized as an internal or external command, operable program or batch file.

然后发现任何CMD命令都无法识别

原因：电脑用户环境设置有问题，到如下位置修改：

鼠标右键点击 My Computer-> Properties-> Advanced -> Environment Variables -> Path
在最前面添加：SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem;