How to get Internet via LAN?

I bought a new Laptop of Lenovo with OS as Windows 8.1. I already have a PC with Windows 7 and Internet connection.

Now I want to connect my Laptop with my PC and get internet access. Can someone please guide me step by step process on how to do this.

Thanks in advance for all who helps me in this.

Buy a router and plug both computers into the router

If you have an internet router that has more than one Ethernet socket, run a cable from the laptop to the router, or if that's at the other end of the building and you don't want to run another cable all the way, buy an Ethernet switch, connect that in line near the other computer and link the laptop to another switch port.
A switch expands the number of connections available from a router.

If your have a modem-only internet connection that just has a single ethernet port, you need to buy a "cable" style router and connect that to the modem, following the instructions that come with it.

It's the router than gives the multi-device capability; a modem on it's own can only have one thing connected to it.
Most routers also include Wi-Fi.