Ah. Well Perl 5.6 on Windows offers an emulation of fork, but does not actually provide forking. Personally I would not trust it. However I have successfully used Run commands in parallel under Windows NT. But YMMV.

Personally I think that if you want to play with process control, you are best off either using a Windows model or else getting yourself a Unix or Unix-like system. (These days it isn't that hard to install Linux or FreeBSD...)