How to Create a VPN Server on Your Windows Computer Without Installing Any Software
 

Windows has the built-in ability to function as VPN server, although this option is hidden. This trick works on both Windows 7 and Windows 8. The server uses the point-to-point tunneling protocol (PPTP.)

This could be useful for connecting to your home network on the road, playing LAN games with someone, or securing your web browsing on a public Wi-Fi connection – a few of the many reasons you might want to use a VPN.

http://www.howtogeek.com/135996/how-...-any-software/