Win7 system CMD command error prompt is not internal or external command

1. Press the “Win” key at the same time to bring up the running window and type “<quo;path %windir%system32”, basically solve the problem.
2, if you still can't use it after restarting, you need to right click on “Computer” to select the attribute, then select “Advanced System Properties”, then click “Environment Variable” to see “windir” The value of ; is best modified to the system default value, if there is no such thing as "windir", create a new variable of the same name.

This is the solution to any command input in the CMD command line, it is prompted "not internal or external commands, nor is it a runnable program or batch file" solution, there are problems encountered Users, use this method to solve it.