I think I screwed up the installation, is there a way to revert the problem?

Let me start off by saying I’m a newbie with using Linux, so I followed a video tutorial to install the drivers, and it did mention that it was a risky approach, but for some reason I ignored that. Here’s what I did:-

Terminal
sudo add-apt-repository ppa:ubuntu-x-swat/x-updates
sudo apt-get update
sudo apt-get install nvidia-experimental-310 --> This is the risky command

I downloaded 2 different drivers from 2 different sources (but the same domain). I installed the first one using the commands I wrote above (not sure if that worked), and I haven’t installed it yet from the second link. They seem to be different versions of the same thing though take a look at them.

First Link: http://www.nvidia.com/download/driverResults.aspx/87650/en-us
Second Link: http://www.nvidia.com/Download/driverResults.aspx/71303/en-us

I’m experiencing unusual lags when I do things as simple as using the text editor, or when I move a window. My computer’s specs are: http://oi61.tinypic.com/6pntac.jpg

So is there a way to revert the problem that I created? And how do I install the drivers for my computer?

Thanks in advance!

You’d better ask at ubuntu forums, not here.

This forum is about official binary (unpackaged) drivers.