• Environment variables in Windows 8.1

    Just got this question from RJ:

    On previous windows versions I have been able to go through the control panel to set both personal and system environment variables–specifically so the commands from installed programs can be executed by entering them.  I have found a way to SET the PATH to include appropriate libraries to search, but the change is inoperative; as in goes away after being set.  does one need a special set of privileges to accomplish this, or must it be done through some other mechanism than: Control Panel–>Advanced–>environment variables–>system–> PATH edit.