Make sure you do not have any version of Perl already installed. (see video below for details),
If you do uninstall it through
the Window control panel "add/remove programs", if you still
have a C:\Strawberry folder rename or delete it
Download and install
Strawberry Perl. You also get many other useful CPAN modules as well).
Log out and back in (or reboot)
Go to your start menu, then click the "Perl command" link