Later on today (1st October 2014), you'll be able to download the Windows 10 Preview. I'd strongly suggest running this in a virtual machine (perhaps using VirtualBox: https://www.virtualbox.org) or perhaps Dual-Booting.
From what I understand, this download link may be active from 6PM GMT today:
http://preview.windows.com/
Remember, if you do give it a go, please give some feedback on what you think of it as it will help MS make a better product in the end.
From what I understand, this download link may be active from 6PM GMT today:
http://preview.windows.com/
Remember, if you do give it a go, please give some feedback on what you think of it as it will help MS make a better product in the end.