Connectify is a free Windows 7 software that lets you turn your Windows 7 into a WiFi hotspot. Of course, there’s other more complicated ways of doing this but I think this is the simplest and since the software is free, this could be a great way to make your hotel wired internet into WiFi for everyone in your family.
Or if you have a spare computer and you “still” don’t have WiFi in your house, this could be a good option while also turning your spare computer into a network storage.
You might be at a location where there is only one Ethernet connection available (hotel room, office or meeting room etc.) and you need to share the Internet connection with other people or devices. Connectify is a free utility which is light on system resources and makes it easy for you to set up your Windows 7 machine as a secure WiFi hotspot.
via howtogeek (See full how to instructions here)