Microsoft has released a free Consumer Preview build of Windows 8 to public. There are many things which have been changed or added in Windows 8 such as new Start Screen which has replaced the good old Start Menu in Windows 8, Microsoft Office 2010 like Ribbon UI in Windows Explorer , removal of Start button, a little bit modified Ribbon UI in Windows Explorer, new login screen, better Start Screen, etc.
System Requirements :
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
JustNC 
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[…] Microsoft has released Windows 8 Consumer Preview . Which come with lots more changes , improvements as compared to previously released Developer […]