Install Windows 8.1 on separate partition & Dual Boot it with another OS

We have already seen how to upgrade Windows 8 to Windows 8.1, in our last post. Now we will see how to install Windows 8.1 on a separate partition. I did not want to upgrade my existing working Windows 8 installation to Windows 8.1 Preview, and yet wanted to check out Microsoft’s latest offering. So I decided to install it instead on a separate partition so that I could dual boot Windows 8.1 with Windows 8.

Dual boot Windows 8.1 with another OS

First I created a separate partition using the built-in Disk Management tool. Next I downloaded the Windows 8.1 Preview Client ISO file with the built-in apps.


Next I burned the ISO file to a DVD. Once I had burned the image, and restarted my PC and booted from the DVD. The installation commenced. It was just then that I decided to take pictures on the installation process with my Nokia Lumia 920, so kindly excuse the quality of the images.

You will first see the betta fish for a while after which, it will check if any updates are available. Then you will be asked to input the Product Key, which is NTTX3-RV7VB-T7X7F-WQYYY-9Y92F. Next you will be required to select the Language, Time Format, etc.

Install Windows 8.1Make your selection and click Next. You will now be presented with a screen that will require you to click on the Install Now button.

Install Windows 8.1 2

Accept the Microsoft Licensing Terms and click Next.

Install Windows 8.1 3

Since I wanted to install Windows 8.1 on a separate partition, I clicked on Custom Install.

Install Windows 8.1 4

Install Windows 8.1 on a separate partition

You will be asked to select the partition where you’d like to install Windows 8.1. I selected Drive D, which I had specially created. If you wish to format the partition, you can do so here, from the options given.

Install Windows 8.1 5

Once done, click on Next. Installation will commence and take a while.

Install Windows 8.1 6

Your computer will reboot twice during the Installation process. You will finally see the following screen which will show that Windows 8.1 Preview has been installed.

Install Windows 8.1 7

Select this option and boot into Windows 8.1 to get an all new Windows experience!

See this post to learn how to install Windows 10 from USB.

Posted by on , in Category Windows with Tags
Anand Khanse is the Admin of, a 10-year Microsoft MVP Awardee in Windows (2006-16) & a Windows Insider MVP. Please read the entire post & the comments first, create a System Restore Point before making any changes to your system & be careful about any 3rd-party offers while installing freeware.