Install Ubuntu as a dual-boot with Windows without partitioning: How to Install Ubuntu without Any Partitioning.

Do you know that you can install Ubuntu operating system of your computer without any type of partitioning. It's very simple. The only thing is that you need a Ubuntu CD. Now, start your Windows XP machine. After the start-up, insert the CD on the CD/DVD ROM drive. The CD will be auto run. If not then open it manually and click on autorun. A menu will be appeared and click on Install inside windows. Later, set the location of the drive, disk space of your computer and click on Install button. Within 5 to 20 minutes, Ubuntu will be installed and it asks to restart the computer. Restart your computer and when the computer starts up, it will ask you to choose the operating system to run. Use the cursor key to select Ubuntu and hit Enter key. Very soon Ubuntu will be prompted username and password and log in with your username and password. That's all you can install Ubuntu without partitioning any drive in Windows XP.

To learn more in details with pictorial explanation, you may follow the following link:

Install Ubuntu as a dual-boot with Windows without partitioning: How to Install Ubuntu without Any Partitioning.