In this article you will learn how to create a Windows 8 installation USB key.
As for the previous version of Windows, you can install Windows 8 directly from a USB key, which can be very useful for devices that don't integrate a DVD/CD reader (netbooks..)
Microsoft provides a free tool for this purpose: Windows 7 USB DVD Tool which can also be used to install Windows 8. Download Windows7-USB-DVD-tool.exe here and install it.
You will also need the ISO version of Windows 8. You can download/buy a legal copy or create one out of the Windows 8 installation DVD
A USB key with at least 4 GB or more is required.
Connect the USB key to the PC containing the ISO file.
Then run the Windows 7 USB DVD Tool and follow the steps and instructions, (specify the ISO file, then the USB destination and wait for the program to "prepare" the key).
At the end of the process, you will have a bootable USB key, with a ready to be installed OS.
If you have another system installed on your hard drive, you can create another partition to test out Windows 8. It is best not to remove your current system and have dual boot configuration, in the event that Windows 8 doesn't fit to your current needs.