The command and response:

C:\Users\Jason>ipconfig

'ipconfig' is not recognized as an internal or external command, operable program or batch file.

Solution

Right click My Computer > Properties

Advaned System Settings

Advanced tab > Environment Variables.

In text list under system variables, double click variable named "Path

Add text "C:\Windows;C:\Windows\system32" in variable value at the end.

Restart the command prompt.