How do I create a bootable Windows USB drive?

You must first build the installation media before installing Windows from a USB drive. Once the USB flash drive is connected, your computer will be able to read this and boot from it. The methods for making a bootable USB flash drive using Microsoft’s Media Creation Tool are outlined here.

1. Download the appropriate installation media from Microsoft: 
   1. Download Windows 10 
2. Follow the steps to download the Windows version you want. Some versions may require you to provide your Windows product key to verify your eligibility to download disc images.
   
   
3. Save the Media Creation Tool to your computer. When the download is finished, launch the file and click Accept when prompted to agree to the software license terms.
4. Select Create installation media (USB flash drive, DVD, or ISO file) for another PC and click the Next button.
5. Follow any on-screen instructions to set your preferred language, Windows edition, and System Architecture. If unsure, check the Use the recommended options for this PC option and proceed.
   
   
6. Choose the USB flash drive, and then select your USB from the list. The Windows installation files will start to download to your USB drive.
   
   
7. Note that the download may take a long time depending on your internet connection. Make sure not to disrupt the process until the bootable USB drive is created.