How-to Windows 8 dual-boot with Windows 10 Technical Preview

  • Windows 8 or 7
  • At least 20GB free space
  • Windows 10 ISO (Download it here) burned on a DVD disk.
  • Your system must be set to boot from a DVD.
  • Your system must have 2 or more partitions

Installing Windows 10

1. Start your Windows 8 machine with the Windows 10 installation disc in the drive.

You must boot from the Disc! It’s not possible to install Dual-Boot within Windows 8

2. Wait for the message `Press any key to start….´ to show and click any key

3. Windows Setup will start, choose your language, keyboard …. and click Next

Install How-to Windows 8 dual-boot with Windows 10 Technical Preview dual-boot


4. Click the Install Now button

5. Click Custom Installation 

6. Choose a Partition where no current Windows Installation is installed on

Choose Disk How-to Windows 8 dual-boot with Windows 10 Technical Preview dual-boot

Choose Disk

Make sure there is no installation on the partition you choose, doing this will make your old Windows unusable.

7. Now wait! Write down the Drive and Partition number of the drive (it’s marked in a red box in above image) where Windows 8 is installed on! Then click Next.

8. Wait for the installation to finish. Windows 10 will automatically start.

9. Complete the set-up of your account and so on. Continue if you see the Windows 10 desktop.

10. Windows 10 is now successfully installed, reboot your device and you will automatically see the Windows Boot Loader.

Windows 10 Bootloader How-to Windows 8 dual-boot with Windows 10 Technical Preview dual-boot

Windows 10 Bootloader

We hope you were succesful in installing Windows 10 in Dual-Boot with Windows 8 (or 7) If you have any problems then please comment, please add the things you wrote down in Step 7 to your comments 😉

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About The Author
Yuri Pustjens
Yuri Pustjens
2014, 2015 & 2016 Microsoft Most Valuable Professional Windows Yuri specializes in troubleshooting (crash analysis and devices), system resource utilisation and system performance. He is also very interested in Customer Security. Yuri can be found as Windows Community Moderator and Wiki Author on Microsoft Answers and is active on different communities all across the web.
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  • October 12, 2014 at 10:05 pm

    Your wrong! YOU can install with this download, from this disc;that, it was put(burned) onto! BUT…I can not get my system to boot–from this download(burned) disc…no matter what I do.(So far)

    • Yuri Pustjens
      October 12, 2014 at 10:08 pm

      Good evening Joseph.

      The article is not wrong, however your BIOS settings are wrong. It does not allow you to boot from a disc. You have two options.

      A) When your system boots check if a message appears “Press XXXX for the Boot Menu” and then select DVD-Rom
      B) When your system boots look for a message saying “Press XXX for Setup” press that key and find Boot Settings then set the DVD-Rom as first boot device.

      Be careful changing BIOS Settings could render your system unusable.

      Let me know if it helps

  • Caleb
    October 9, 2014 at 9:52 pm

    Thank you for the suggestion. Since my previous comment, I reinstalled Win 10, and now, dual boot works. Not sure what happened the first time around. Reinstalling was inconvenient but worked. Thanks again.

  • Caleb
    October 9, 2014 at 2:58 am

    Since this method does not work with Vista and 10, is there another way?

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