Microsoft has officially released the Developer Preview Pre-Beta version of Windows 8. This version is a Pre -Beta Build 8102 version for developers, and not suitable for who are expecting a stable version. This version includes pre release softwares which may change without any notice. The developer preview version of Windows 8 that was released to developers during the build conference is also made available to normal computer users. This version of Windows 8 needs no registration and hence is free for all.
3 versions of downloads are currently available officially from Microsoft on MSDN.
1. Windows Developer Preview English, 64-bit (x64)
Size: 3.6 GB
SHA-1 Hash: 79DBF235FD49F5C1C8F8C04E24BDE6E1D04DA1E9
Direct Download Link: WindowsDeveloperPreview-64bit-English.iso
Note: Includes a disk image file (.iso) to install the Windows Developer Preview and Metro style apps on a 64-bit PC.
2. Windows Developer Preview English, 32-bit (x86)
Size: 2.8 GB
SHA-1 Hash: 4E0698BBABE01ED27582C9FC16AD21C4422913CC
Direct Download Link: WindowsDeveloperPreview-32bit-English.iso
Note: Includes a disk image file (.iso) to install the Windows Developer Preview and Metro style apps on a 32-bit PC
3. Windows Developer Preview with developer tools English, 64-bit (x64)
Size: 4.8 GB
SHA-1 Hash: 6FE9352FB59F6D0789AF35D1001BD4E4E81E42AF
Direct Download Link: WindowsDeveloperPreview-64bit-English-Developer.iso