Suppose you have just purchased a new laptop. No OS is installed on it and you are supposed to do this. But if you have no idea how to do this, you are in the right place right now. In this guide, I am going to show you how to install almost any OS on a new computer. You can install the OS on your computer by using CDs and DVDs or by using a USB flash drive. 

If you have an original Windows 10 OS DVD, or if you downloaded the Windows 10 .ISO from Microsoft and burned it to DVD, you can easily perform a clean installation with it. But I am going to show you how to do it by using a USB flash drive. Before starting, it’s better to know the meaning of the following terms.

UEFI

UEFI is a new firmware that replaces the old BIOS. In new computers, UEFI is used instead of BIOS.

Fast Boot

Fast Boot is a UEFI feature found on some motherboards. This feature enables your computer to boot faster than normal.

Now let's get into the business. To create our bootable USB, I am going to use a free and open-source software named Rufus. It allows us to create USB drives fast. Rufus also can make Live USB drives, bootable hard drives, and SD cards. It is a super light-weight software that weighs just 1.1 MB. Despite its small size, Rufus is a software that provides everything you need. You can get Rufus from their website.

To install the OS, you need to have the following things with you.

1. Rufus Software
2. .ISO file
3. A USB drive with at least 8 GB of capacity

After preparing everything necessary, we can open the Rufus software now. Once you open Rufus, you will be presented with the home screen. On there you will see an area for USB drive selection. Simply plug the USB drive into your computer and wait till it shows up in that area. Once it shows, you can move to the next step.

Once the USB drive is shown in Rufus, all you have to do is locate the ISO file that you’ve previously downloaded. 

After that, there are two options in the bottom field that says “Partition Type”. One of them is "GPT" and the other is "MBR". If you have a computer with a new BIOS interface, you have to select GPT if you are going to install UEFI.  But, if you are going to install UEFI on a system with an old generation BIOS interface, you have to select MBR.

Now, we’re almost done. You can click on the “Start” button to start the process. Rufus will take a few minutes to create your bootable USB. After preparing your USB drive, you can start the installation by booting your computer from the USB drive that you’ve just created.