Shoutbox

Ok I'm going to try and explain the set up I have got and what I'm trying to do.  May take a few goes but hopefully you guys will be able to understand and be able to help me in what I'm trying here.

Ok I have both a laptop and a main pc.  I use the main pc for most of my stuff but sometime I just wanna go and lie down in my bedroom on the laptop still talking to people.

Now I have all my chat logs on the main pc and use the network to save any chats i make on the laptop onto the main pc.  I also download things on that pc and can control the app from the laptop over the web using a web gui.

What I want to know is, is it possible to somehow turn off the main pc from the laptop when I am finished using the connections I am making?  As sometimes when I'm working in my bedroom I end up going straight to bed, and as the main pc is two floors down and at the other side of the house, I don't really want to go all the way down there to turn it off.  Is there anything I can set up to achieve this?

Thanks in advance