In case the wake-on LAN feature isn't what you were after, you could also use remote desktop connection (assuming your Windows computer is already powered on) to control the computer and execute the program. Some of these remote connect apps for the iPhone are free. You would just need a basic free one in order to do this. Just make sure your laptop has remote desktop enabled and that the laptop has a static IP address. Also, if you get a free DDNS (dynamic DNS) and set up some port forwarding through your router/firewall, you can remote connect to your laptop from anywhere in the world to disable/enable the icamsource software. Once you get it all set up, it's easy sailing!