After installing virtualenv in Python, the error virtualenv is not an internal or external command or a runnable program when creating a virtual environment

When you create a virtual environment package, you will report “”‘virtualenv’ Not an internal or external command , It's not a runnable program “ error
First rule out whether the word is misspelled
I have searched the Internet for a long time, but I haven't seen the situation myself , Can install successfully , adopt pip list The successful installation will be displayed when querying ,
But there will be two yellow lines , There is no path , Environment variables need to be configured .

resolvent ：
The reason for this is that the permission is insufficient
Running cmd On command , Right click to select run as administrator and then install to solve this problem .