After connecting your phone to the PC, you need to go to the settings of your phone. Then you need to go to the network option and choose tethering and mobile hot-spot option. Under that option, you will get two options, connecting through USB and connecting through Wifi. Tick the USB option and the phone will automatically connect your PC to the internet, without the requirement of any software to be installed on the computer. This option can be used in case the battery of the phone is low as connecting through USB also charges the phone side by side.