FYI, Windows can absolutely have Perl (and for free) -- ActiveState.com -- however, it's well known that Linux is much better for software development, welcome aboard.

It may be a great learning experience (and I hope that is why you are doing it), but you do realize you are cloning the world's most crippled shell interface, right? Ugh, DOS. If only it were dead...

FYI, here is Micro$oft's proposed DOS replacement: MONAD (Google search)