I will explain the ways to Install Ubuntu Linux on your computer/laptop. There are three ways of Installing Ubuntu, which are as follows:

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1). Dual-booting

Boot into Windows or using an Ubuntu Live CD, you have to insert your Ubuntu Live CD to your CD-ROM drive and reboot your PC.

2). Installing within Windows

Wubi is an officially supported Ubuntu installer for Windows users that can bring you the Linux Community. Using Wubi to install Ubuntu is just like installing some Windows software,
and is equally risk-free. There’s even an uninstall option added to
Add/Remove Programs.