Here is a guide to install Wine on Ubuntu 12.04 using the WineHQ PPA. Wine lets you run Windows software on other operating systems. With Wine, you can install and run these applications just like you would in Windows.
Wine is still under active development. Not every program works yet, however there are already several million people using Wine to run their software.
To add the PPA and install Wine open a terminal window (press Ctrl+Alt+T) and copy+paste the following lines:
sudo add-apt-repository ppa:ubuntu-wine/ppa
sudo apt-get update
sudo apt-get install wine1.4
When Wine is installed you can close the terminal window.