What is a Bootable USB?

A “bootable USB” is a regular USB storage device (like a USB stick or external hard drive) that has an “ISO image” of an operating system saved on it.

An ISO image is an archive file that contains all the information found on an optical disc, such as a CD or DVD. This could, for example, be a Windows installation CD.

Normally, whenever you start up your computer, it boots from the operating system stored on your internal hard drive. By running the bootable USB however, you can boot up your computer using the USB’s ISO image instead.

This can be useful if you ever need to recover, repair or install an operating system on your computer.

How to Create a Bootable USB using Rufus

Rufus is one of several programs that allow you to create an “ISO image” on a USB stick. To create a bootable USB using Rufus, all you need is:

• Your ISO of choice, e.g. Windows 10 📀

• Download the latest version of Rufus (available online) 📥

• A spare USB stick (an 8GB USB should be plenty for Windows 10 but make sure you have one that’s large enough for the ISO you’re using)

Once you’ve got these ready, just follow these steps to make your own bootable USB

Step 1:

Open up Rufus and plug your clean USB stick into your computer.

Step 2:

Rufus will automatically detect your USB. Click on Device and choose the USB you want to use from the drop-down menu.

Step 3:

Make sure the Boot Selection option is set to Disk or ISO image then click Select.

Rufus will open a file explorer browser window; locate the ISO image you want to burn onto the USB and select it.

Step 4:

You’ll generally want to create a Standard Windows installation, and Rufus will automatically detect the correct Partition Scheme based on your device, so keep the default settings as they are. However, you can also change these if you want.

Step 5:

Customize the installation of your choice, or leave it as it is, and once again leave the default settings for File system. Now click Start

Note: if the USB you’re using isn’t large enough, you’ll get an error message you letting you know. In this case, you’ll need to start again with a different larger USB.

Step 6:

You’ll get a warning saying that any data on the USB will be destroyed (this is normal). Click OK and Rufus will start creating the ISO image on the USB.

Step 7:

Once Rufus has finished creating the ISO image on the USB, you can close it and your bootable USB is ready to go!

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