...At the command promp you should write:where perl And what you read as an answer is what you should copy at line 1...
FWIW, on my non-Win machines, this has always been which perl rather than where perl.
From the man page:
- which takes a list of names and looks for the files which would be executed had these names been given as commands. Each argument is expanded if it is aliased, and searched for along the user's path.
Liz