GHacks posted a tutorial about setting up a VPN on Windows 7

This is a basic tutorial on how to set up a VPN, or Virtual Private Network on Windows 7. You can use this to set up your own VPN server. This assumes you are using a router to connect to the Internet, and you have permissions to add port forwarding to the settings. You’ll also need access to a second computer to test if your VPN is working correctly.

  How to Set Up a VPN on Windows 7