How to install Ubuntu from Windows XP, Vista, 7, 8 just remotely by single click?

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http://askubuntu.com – I have a Windows 7 PC running in USA via VNC (when with a public IP), Logmein (when behind complex NAT) remotely I am watching and logged in. But the Windows 7 PC does not need Windows, it requires Ubuntu and I have the permission to do so. But what I do not have is my hands and eyes remotely. So, how can I install Ubuntu in a working Windows 7 PC, so that after installation it reboot and sends me remote login link in my email. And every-time I have Ubuntu. (HowTos)