Highly anticipated Microsoft’s new Operating system Windows 8
Developer Preview is Now Available for Download.
Windows Developer Preview English, 64-bit (x64)
Download link
http://wdp.dlws.microsoft.com/WDPDL/9B8DFDFF736C5B1DBF956B89D8A9D4FD925DACD2/WindowsDeveloperPreview-64bit-English.iso
Windows Developer Preview English, 32-bit (x86)
Download link
http://wdp.dlws.microsoft.com/WDPDL/9B8DFDFF736C5B1DBF956B89D8A9D4FD925DACD2/WindowsDeveloperPreview-32bit-English.iso
Download windows 8 consumer preview from here
system requirements for the Windows 8 Developer preview:
* 1 gigahertz (GHz) or faster 32-bit (x86) or 64-bit (x64) processor
* 1 gigabyte (GB) RAM (32-bit) or 2 GB RAM (64-bit)
* 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
http://msdn.microsoft.com/en-us/windows/apps/br229516