Here's the website for Realtek your Semiconductor card RTL8111/8168B
Readig about this driver for your Realtek Card might help.
Here is the Linux driver for your Realtek card:
You have a Nvidia Corporation Graphics card and it looks like model # 110m Geforce (G72m)
Not sure if your graphics card is causing the "freezing or not"...but it can't hurt to install a driver for you Nvidia Graphics card. I looked for a driver for your card and I could not find one. Sorry-
I know you said that you would rather fix your laptop instead of purchasing a new one.
You may have to purchase a new one because I was not able to find drivers that I'm pretty sure that you need in order for your system to work.
You could contact Asus or a computer repair shop and have a tech put new cards in your laptop for a fee.
Or you could put in new cards yourself.
The Geek Squad at Best Buy offers a service for computer repair:
What Causes Computers To Freeze:
I found several articles to help you to possibly diagnose:
(This is Solved)
I noticed that you had a buffer error in the output of 'lspci"
This man discusses what happened with his and how he Solved it-
If it were me waseq; I would try purchasing new hardware and have it installed by a computer tech.
That way you haven't spent more than what it would cost to purchase a new laptop.
Sorry I couldn't be of more assistance.