"Live" Linux CDs are self contained distributions that run without any modifications to your computer. You simply tell your computer to boot of the CD and it just works. These CDs typically contain multiple versions of every kind of program the average user wants and often configure the Graphical User Interface better than the average person can. Knoppix, one of the most popular live CDs, has two office suits with everything found in the most expensive versions of Microsoft Office, two browsers, many email clients, games and utilities.
To get one of these for yourself, go download and burn any of the following:
It's easy to do yourself, if you have a good internet service provider and there are many vendors if you don't.