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windows multiple boot isoCreating a bootable USB disk comes handy when we have to reinstall our operating system in the case of a system failure. It’s effortless to put ISO files on portable flash drives by using various tools–like Windows USB/DVD tool and the Startup Disk Creator in Ubuntu.

There are many operating systems available in the market, either free or paid. Each is having its multiple versions and features. You can’t waste a flash drive for each of them. It would be great if you put all the ISO files on a flash drive and make a multiboot USB using. Life is a lot easier when a single storage media houses many ISO files.

The process to create multiboot USB disk is quite simple. For Windows OS, these multiboot USB disks can be created using a popular tool known as WinSetupFromUSB. It allows you put multiple ISOs in one installation disk.

You can put Windows and Linux in the same bootable disk or create a master installation disk of Windows 7, Windows 8.1, and Windows 10. The choice is up to you. Moreover, making multiboot USBs can be very helpful for Linux users who have to deal with various distributions each having its own set of features.

Before proceeding with the method, if you don’t have the ISO files for Windows OS, the link below would guide you through the process to download them legally.

How To Download Windows 10, 8.1, And 7 ISO Files Legally | Download Windows Legally

You must arrange a USB flash drive of considerable size. To stuff three Windows ISOs in the multiboot USB disk, you will need a 16GB flash drive.

In case, you are searching for some bootable USB tools, here are some suggestions.

How to create Multiboot USB Disk in Windows?

  1. Download WinSetupFromUSB. Extract this file.
  2. Connect the flash drive to your computer.
  3. Open WinSetupFromUSB. Open the 32-bit and 64-bit version according to your OS. It will work without any installation.
  4. Make sure your flash drive is listed and selected in the drop-down menu. Click Refresh, if it is not on the list.
  5. Tick Auto format it with FBinst.
    Note: You have to tick this option only for the first ISO installation. Choose FAT32 if your computer is set to boot using UEFI mode or if UEFI sounds strange to your ears. Else, go with the NTFS option.
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  6. Click Advanced options.
  7. Tick the Custom menu names for Vista/7/8/Server Source checkbox. Click the Cross (X) button to exit Advanced Options.
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  8. To add the ISO file for your multiboot USB, tick the checkbox corresponding to OS under Add to USB disk subheading.
    For example, I am using the Windows 8.1 ISO.
    Note: If the size of your ISO is larger than 4 Gb, it will show a message to split the file into parts. This is because you’ve chosen the FAT32 option. Click OK.
    win4Note: WinSetupFromUSB doesn’t support dual ISOs i.e. it can’t have 32-bit and 64bit version in a single ISO. It will show an error message.
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  9. Click GO. A data deletion warning message will be displayed. This is because you’ve chosen to format the flash drive. Click Yes.
    Note: Do remember to check the flash drive name before clicking Yes. Else, you’ll end up formatting some other connected storage media.
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  10. Another warning message will be displayed telling you that all the partitions will be erased. Click Yes.
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  11. Next, it will ask for the folder name. Type the desired one in 30 seconds or it’ll auto select. Click Ok.
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  12. It will ask for the boot menu name. This will appear when you run the multiboot USB on some PC and choose an operating system. Type your desired name like Windows 8.1 64-bit. Click Ok.
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  13. The process will take few minutes to finish.
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  14. Click EXIT to finish.

How to add the second ISO file in the Multiboot USB Disk?

  1. Start the tool again.
  2. Select your flash drive in the drop-down menu.
  3. Click Advanced Options and look for Custom menu names for Vista/7/8/10/Server Source.
  4. Don’t Click Auto format with FBinst. That’s because it will remove your previous ISO file.
  5. Add the second ISO file for your multiboot USB.
  6. Click GO and repeat the steps mentioned earlier.

Follow the same process to add more ISO files.

What to do after making your multiboot USB?

Now that you have your multiboot USB up and running, it’s time to see the action. Plug the flash drive in your computer and set the boot device to USB. Most desktops and laptops have a dedicated key to trigger the boot menu. After the multiboot USB loads, choose the desired operating system from the list.

So, this was the method create multiboot USB flash drive which allows you to choose between multiple operating systems at a time. Use the method to put a 32-bit and 64-bit version of the same OS in one bootable media.

If you have something to add, tell us in the comments below.

Also Read: How To Create Bootable USB Without Any Software In Windows 10 (Using Command Prompt)
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Aditya Tiwari
When he is not writing for Fossbytes, he is busy eating his daily cheat meal and finding content to binge watch. Please feel free to suggest him some good stuff on Netflix. Reach out at [email protected]