Here, is a quick tutorial to use Android as PC Wi-Fi card. If you want to connect to a wifi network, but your PC does not have a Wifi card, you can use Android phone as a temporary wifi card for your PC.
Basically, idea is to connect to wifi network from your Android phone, and then share that internet connection with your PC by connecting Android phone to PC with USB cable.
There are many apps that we have covered earlier that can easily achieve this, like Easy Tether Lite app for Android. For the purpose of this tutorial, we will use ClockworkMod Tether app to share Android’s internet connection to PC via USB cable. Your Android phone will work as a W-Fi card for your PC sharing the Wi-Fi internet with PC.