As you know, Windows 8 developer preview already out and I hope most of you guyz already download it on your computer. If you still not downloaded please do it from below link.
Download Microsoft Windows 8 Developer Preview
Step 1: Make sure you have at least 25 GB free on your hard disc.Now Create a new partition for this 25 GB.
Step 2: Now create a Windows 8 USB bootable drive. I hope below article will help you to create a windows 8 bootable USB drive.If you don’t know how to create a bootable windows 8 USB drive follow the link below.
How to Create a Bootable Windows 8 USB Flash Drive
Step 3: Restart you computer and go to bios settings and make USB as the first boot device. Once done restart again your computer.
Step 4: Windows will now start installing files to start the setup process.Once done, go through the installation process.Once the installation completes, shut down and switch on the PC to see the new graphical boot menu.
Step 5: Select the operating system that you want to boot into and hit Enter key to start using your PC.