Download Windows 8 Consumer Preview build 8250 English Full Version

Product Key: DNJXJ-7XBW8-2378T-X22TX-BKG7J

or

NF32V-Q9P3W-7DR7Y-JGWRW-JFCK8

Requirement : 

Windows 8 Consumer Preview works great on the same hardware that powers windows 7:Processor: 1 gigahertz (GHz) or fasterRAM: 1 gigabyte (GB) (32-bit) or 2 GB (64-bit)Hard disk space: 16 GB (32-bit) or 20 GB (64-bit)Graphics card: Microsoft DirectX 9 graphics device or higherTo use touch, you need a tablet or monitor that supports multitouch
To snap apps, you need a screen resolution of at least 1366 x 768

X64

Size : 2.37GB

Download Windows 8 Consumer Preview build 8250 ---64bits

X86

Size : 3.25GB

Download Windows 8 Consumer Preview build 8250 ---32bits

if you need windows loader for windows 7 (X64/X86)/ 8 (X64/X86)  you can 

Click-here