PSEXEC

This little tool lets you run process's on a remote computer.

And if its a console program, like cmd, then you can get feedback too. So you can get a remote cmd prompt to any computer on your network!

Usage is simple:

psexec \\computername cmd.exe

(this will only work if you are already authed to the computer, like it a domain member, and you are a domain admin for example)

more info and download at http://technet.microsoft.com/en-us/sysinternals/bb897553.aspx