in reply to How to connect to unix machine from Windows and execute command
There is no standard service in Windows that lets you do this except PowerShell (available in newer versions) which is a completely closed ecosystem of signed commandlets and twisted idioms. If anyone finds a simple way to invoke PowerShell remotely using Perl they deserve a Nobel Prize.
AFAIK you will need to either find a suitable "server" software package to install on each Windows host, or write your own. Keep in mind that if you want to use anything like this in a production environment you will need a firm understanding of the security challenges involved. How will you handle authorization and authentication in a way that does not expose sensitive information?
Edit: As was pointed out, I read the question a liiittle too fast. :o)
Ye Olde rsh and telnet are to be used only where security issues can be completely ignored. SSH is much better but still only as secure as the weakest endpoint; if someone finds the password or keys they will have the same access as you do.
Time flies when you don't know what you're doing