Use a application such as Virtual Router Plus to turn your laptop into a Wi-Fi hotspot. This app works for all modern Windows systems. Install the application, set a name and password, and click on Start Virtual Router Plus.
Virtual Router Plus is a free, open source software-based router for Windows devices. Using this software you can share an Internet connection wirelessly from your PC to other Wi-Fi devices. These devices connect to the virtual router like any other access point and is secured by WPA2. If you are on different operating system, use Connectify to do the same task.