How to make bootable Windows 10 USB flash drive without formatting?

We here at gearupwindows love installing Windows OS from a USB flash drive. In a few days, we have covered several articles and free tools to create a bootable USB drive and install Windows from the USB drive or external hard drive.

A few freeware tools over the internet let you create a bootable USB flash drive of Windows 10 / 8 / 7. Rufus’s name comes first when we talk about a bootable USB flash drive. Rufus is the most popular and fastest tool that lets you create a bootable USB flash drive and help create a Windows To Go USB drive.

WinUSB MakerWindows USB/DVD Download ToolAnyBurn, and ISO2Disc are few names with a good user interface and let you easily create a bootable USB flash drive from an ISO file. One can even create a bootable USB flash drive using a command prompt, but it is time-consuming and not good for a novice.

One similar problem with the above tool is that it does not let you create a bootable USB flash drive of Windows 10 / 8 / 7 without formatting the disk. If you have some important data in your USB flash drive that you don’t want to offload somewhere else as you don’t have free space in your hard drive, you want to create a bootable USB Windows disk, then here you will be in trouble.

The good news is that you don’t have to worry about formatting the USB drive / Pen drive to create a bootable USB flash drive. Yes, you can create a bootable Windows USB drive without formatting your USB drive.

EasyBCD is a freeware tool that lets you create a bootable USB drive without formatting the USB flash drive. In a simple word, EasyBCD help you create a bootable Windows 7/8/8.1 USB drive without destroying the data on the USB. This tool is famous for editing the boot menu and various boot settings. This post will walk through the procedures to create a USB flash drive using EasyBCD without erasing the data.

Note: This guide will not work if you have your USB flash drive formatted in the NTFS file system. Even if you can complete the procedure, you will be unable to Boot using a USB flash drive. In other words, your USB drive must be formatted in the FAT32 file system.

How to create a bootable Windows USB drive without formatting the flash drive?

Step 1. Extract Windows 10 / 8 / 7 ISO contents in a folder and copy them all into your USB flash drive.

Step 2. Download and run EasyBCD, the latest version, from here.

Step 3. Launch the EasyBCD from the desktop icon and click the BCD Deployment button.

Step 4. From the right side pane, under the Create External Bootable Media section, select the USB drive that you would like to make bootable without formatting and then click the Install BCD button.

Step 5. You will see on the screen, “EasyBCD is applying the selected action.”

Step 6. Click the Yes button when you see the Bootable Disk Created window.

Now close the EasyBCD software, and you are ready with a bootable Windows USB disk. To install the Windows from a USB drive, change BIOS settings and start booting with a USB disk.

Once you have created a bootable USB flash drive, you can test it without installing it on your computer or laptop.

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