Buying a wireless router is a bit expensive so setting up your computer as your wireless router is a good idea to share your internet connection to other computers at home. And what you need for this are:
1. Windows computer (a desktop, laptop or netbook)
2. Internet connection provided by your ISP. It’s either using a modem through an Ethernet cable, USB broadband or mobile phone.
3. Patience and common sense.
Here are the steps for Windows 7 computer: