Now I think it’s time to do something like a pro. In my previous Windows 10 installation tutorials, I’m asking my readers to install Windows 10 technical preview with much care, because it’s a beta version and betas mostly have bugs in them. However, Windows beta versions are much stable than any other operating system, if you take iOS as an example; iOS 8’s first update was yanked rapidly because it was more buggy than the primary one.
If you feel that your current Windows version is running flawlessly and don’t want to loose it, you can simply dual boot Windows 10 technical preview with your current Windows version. The method to dual boot Windows 10 with any other Windows version supports Windows 7, 8 and 8.1. I’m going to perform this tutorial on my Windows 8.1 laptop.
If you don’t have enough disk space and RAM then you shouldn’t run two different Windows on one computer concurrently.
#1: Create Hard Drive Partition for Windows 10 Technical Preview:
Step 1: From the charms bar open search and type “disk management” in the search bar of Windows 8/8.1 and it will open the disk management window on your screen.
Step 2: Now select your primary drive to create a new partition by allocating its space to the new one. Right click on the primary drive and click on “Shrink volume” button.
Step 3: After few seconds, it will ask you to enter the volume of the disk your want to shrink. Select 20GB of space, that’s enough according to Windows 10 system requirements. Press the “Shrink” button. It will start shrinking the volume.
Step 4: Now you’ll have unallocated space of 20GB, you’re required to make a new partition with the help of this free volume. Right click on the unallocated disk space and further choose “New simple volume” from the available options.
Step 5: Let’s start making a new drive, press the next button and set “simple volume in MB” field to “20GB”.
Step 6: Click next and name your drive(Probably a letter) and click next and now you’ll see few configurations for the newly created drive. Default settings are good, don’t touch these and click next and then finish.
Your new drive is ready for installing Windows 10 on it.
#2: Install Windows 10 Technical Preview on the Newly Created Drive:
Step 1: Now prepare a bootable USB of Windows 10 by using my previous guide and run Windows 10 setup from your desktop or by putting your computer/laptop in the boot mode.
Step 2: Now follow the steps given here to install Windows 10 technical preview. But when it will ask you to select the drive for installation, you’re required to select the newly created drive for installation and everything will run fine.
After the installation of Windows 10 technical preview, when you’ll reboot your machine, it will show you both Windows, choose the one that you want to use.
Note: You’re required to partition the primary drive, don’t make partition of secondary drives, your machine wouldn’t allow to to install Windows 10 on that drive.