Using a DVD?
It’s easy to install Ubuntu from a DVD. Here’s what you need to do:
Put the Ubuntu DVD into the DVD-drive
Restart your computer. You should see a welcome screen prompting you to choose your language and giving you the option to install Ubuntu or try it from the DVD.
If you don’t get this menu, read the booting from the DVDguide for more information.
Using a USB drive?
Most newer computers can boot from USB. You should see a welcome screen prompting you to choose your language and giving you the option to install Ubuntu or try it from the USB.
If your computer doesn’t automatically do so, you might need to press the F12 key to bring up the boot menu, but be careful not to hold it down - that can cause an error message.