help me be hackur?

[phacemeltar]

so theres this pc in my basement with winxp sp3 running on it. i got a minecraft server as the only thing running on it aside from wifi drivers, fresh install. when i scanned the machine for tcp/udp in ncat, it told me that the only port open is this one for minecraft. any idea how i can send a shut down command without going downstairs?

i tried to use telnet on the open server port but it failed. im really uneducated at this stuff and would like to be able to figure it out. any hints/suggestions?