Installing Windows 10 from an external hard drive can be a convenient way to set up your system, especially if you don’t have a bootable USB drive handy. In a nutshell, you’ll need to prepare your external hard drive, move the Windows 10 installation files to it, and then boot your computer from the external drive to start the installation process.
Step-by-Step Tutorial on How to Install Windows 10 from an External Hard Drive
In this section, we’ll break down the process into simple steps to ensure you can follow along easily. By the end, you’ll be running Windows 10 from an external hard drive.
Step 1: Download the Windows 10 ISO File
First, download the Windows 10 ISO file from the official Microsoft website.
To get started, visit the Microsoft website and look for the Windows 10 download page. Choose the ISO file suitable for your system, and begin the download. Make sure you have enough space on your computer to store the ISO file.
Step 2: Connect Your External Hard Drive
Next, connect your external hard drive to your computer via a USB port.
Ensure that your external hard drive is recognized by your computer. If it’s not showing up, try using a different USB port or cable. Verify that the drive has enough free space to store the Windows installation files.
Step 3: Format the External Hard Drive
Format the external hard drive to the NTFS file system.
Open Disk Management on your computer, find your external hard drive, right-click on it and select ‘Format’. Choose ‘NTFS’ as the file system. Be aware that formatting the drive will erase all data on it, so back up any important files before proceeding.
Step 4: Create a Bootable External Hard Drive
Use a tool like Rufus to create a bootable external hard drive.
Download and install Rufus from its official site. Open Rufus, select your external hard drive, choose the Windows 10 ISO file you downloaded earlier, and start the process to make the drive bootable. This might take a few minutes.
Step 5: Boot from the External Hard Drive
Restart your computer and boot from the external hard drive.
Access your computer’s BIOS/UEFI settings by pressing a specific key (usually F2, F12, Delete, or Esc) during startup. Change the boot order to prioritize your external hard drive. Save the settings and restart. Your computer should now boot from the external drive, starting the Windows 10 installation.
Step 6: Follow the Windows Installation Wizard
Follow the on-screen instructions in the Windows installation wizard.
The installation wizard will guide you through the process of installing Windows 10. You’ll need to choose your language, time, and keyboard preferences, enter your product key, and select the drive where you want to install Windows.
After completing these steps, your computer will begin installing Windows 10, which may take some time depending on your system.
What to Expect After Installation
After completing the installation, your computer will restart and boot into Windows 10. You’ll need to go through the initial setup process, which includes configuring your personal preferences, connecting to the internet, and signing in with a Microsoft account. Once you finish this setup, you’ll have a fresh installation of Windows 10 ready to use.
Tips for Installing Windows 10 from an External Hard Drive
- Backup Data: Always backup important data before formatting your external hard drive.
- Check Compatibility: Ensure your computer meets the minimum system requirements for Windows 10.
- Use Fast Drives: A USB 3.0 external hard drive will speed up the installation process compared to USB 2.0.
- Keep Product Key Handy: Have your Windows 10 product key ready during installation.
- Secure Connection: Ensure a stable internet connection for downloading updates during the installation.
Frequently Asked Questions
Can I use any external hard drive to install Windows 10?
Yes, as long as the drive has enough free space and is formatted to NTFS.
Do I need internet access to install Windows 10?
No, but internet access is helpful for downloading updates and drivers.
Will this process delete data on my external hard drive?
Yes, formatting the drive will erase all existing data. Backup important files first.
Can I install Windows 10 on multiple computers using the same external hard drive?
Yes, but you’ll need a separate product key for each computer.
What if my computer doesn’t boot from the external hard drive?
Check the BIOS/UEFI settings to ensure the external hard drive is set as the primary boot device.
Summary
- Download the Windows 10 ISO file.
- Connect your external hard drive.
- Format the external hard drive.
- Create a bootable external hard drive.
- Boot from the external hard drive.
- Follow the Windows installation wizard.
Conclusion
Installing Windows 10 from an external hard drive isn’t as daunting as it might seem. By following these steps, you can easily set up your computer with a fresh install of Windows 10. Remember to back up your data and ensure you have a stable internet connection for a smooth process. This method is especially handy if you lack a bootable USB drive or need to install Windows on multiple computers. Happy installing! If you’re looking for more in-depth tutorials, consider checking out further resources or Microsoft’s official support page.

Kermit Matthews is a freelance writer based in Philadelphia, Pennsylvania with more than a decade of experience writing technology guides. He has a Bachelor’s and Master’s degree in Computer Science and has spent much of his professional career in IT management.
He specializes in writing content about iPhones, Android devices, Microsoft Office, and many other popular applications and devices.