Win8 command prompt cmd command invalid how to do

Failure phenomenon:

After entering the command prompt state, no matter what DOS commands are executed, "XX is not an internal or external command, nor a running program or batch file," as shown:

Reason Analysis:

The problem is that some software has modified the value of path.

Solution:

1, on the desktop to find the "Computer" icon and click the right mouse button, and in the pop-up menu select "Properties";

2, click on the left "advanced system settings";

3, in the Pop-up System Properties dialog box, click on the "Environment variable" button;

4, find the variable "Path", and click the "Edit" button;

5, modify the value of the variable "%systemroot%system32;%systemroot%system32windowspowershellv1.0", and finally click the "OK" button to end the setting;

6, restart the computer can be.