Win7 system DOS command line mode prompt "not internal or external command" How to handle

Win7 system through the cmd command to solve many problems, cmd command in the Win7 system is very practical. Running the cmd command is also possible to have some problems, such as in the cmd command line to enter any command, are not internal or external command, nor can be run program or batch files, how to solve this problem? The solution to this problem is as follows.

1, at the same time press "Win" key + "R" key to pull up the run window, input "path%windir%system32", basically can solve the problem.

2, if after the reboot is still unable to use, also need to right-click the "Computer" select Properties, and then select Advanced System Properties, and then click on "Environment variables" to see "windir" value is how much, it is best to modify the system defaults, if there is no "windir" this item, Create a new variable with the same name.

This is to solve the cmd command line entered any command, are prompted "is not internal or external commands, nor is it a running program or batch file" solution, there are users who encounter this problem, this method to solve it.