Ubuntu is distributed over the Internet as CD image files, called ISOs. To install Ubuntu, you first need to burn its ISO file onto a CD. You need a working CD/DVD burner and an 80 minute (700 Mb) CD for this. This page explains how you can do it using Windows, Mac OS X, Ubuntu and Kubuntu. If the CD writing fails, try writing at a slower burn speed.
1. Download and install Infra Recorder, a free and open source image burning program.
2. Insert a blank CD in the drive and select Do nothing or Cancel if an autorun dialog pops up.
3. Open Infra Recorder, and select the 'Actions' menu, then 'Burn image'.
Select the Ubuntu CD image file you want to use, then click 'Open'.
In the dialog, click 'OK'.
XP / Server 2003 / Vista: ISO Recorder
1. Download and install the appropriate version of ISO Recorder.
2. Insert an unformatted CD into your burner. (Note: one can burn DVDs with this tool only from Vista.)
3. Open Windows Explorer, browse to your ISO file, right-click and choose "Copy image to CD".