Download and install Windows 8 on a new partition

So you want to try out Windows 8. Excellent! But you're not foolhardy enough to try using a developer preview build as your main work/play operating system -- you just want to dabble. We'll show you how to download and install the Windows 8 developer's preview on to a separate partition (or separate hard drive, if you have a spare). If you don't feel like mucking your hard drive with another partition, read How To Download and Install Windows 8 to a Virtual Machine for a less intrusive way to get Windows 8 up and running on your PC.