Download Windows 8 Beta (Consumer Preview)
Microsoft has released Windows 8 Consumer Preview build to public which can be downloaded using the following link:
Simply download and run the "Windows8-ConsumerPreview-setup.exe" from the page above, and it will decide which version of Windows 8 is right for your system. It'll inform you which of your programs are compatible with Windows 8, grab you a product key, and automatically download tools that you may need to create an ISO or bootable flash drive.
Windows 8 Consumer Preview is the beta version of Windows 8. The download include pre-release software that may or may not appear in the final version of Windows 8.
Following are the official system requirements for Windows 8 Consumer Preview build released by Microsoft:
Processor: 1 gigahertz (GHz) or faster 32-bit (x86) or 64-bit (x64)
RAM: 1 gigabyte (GB) (32-bit) or 2 GB (64-bit)
HDD: 16 GB available hard disk space (32-bit) or 20 GB (64-bit)
DirectX 9 graphics device with WDDM 1.0 or higher driver
Taking advantage of touch input requires a screen that supports multi-touch
To run Metro style Apps, you need a screen resolution of 1024 X 768 or greater
To snap apps, you need a screen resolution of at least 1366 x 768
You can upgrade to Windows 8 Consumer Preview from Windows 8 Developer Preview, Windows 7, Windows Vista, or Windows XP, but you might not be able to keep all of your files, programs, and settings.
You can have Windows 8 on your computer in three ways – you can install Windows 8 side-by-side, as a virtual machine (so that it runs inside your existing Windows just like any other software) or Windows 8 can be your main OS (there’s no going back then).
Windows 8 Consumer Preview comes with an expiry date and it'll expire on January 15th, 2013