Windows Developer Preview downloads

The Windows Developer Preview is a pre-beta version of Windows 8 for developers. These downloads include prerelease software that may change without notice. The software is provided as is, and you bear the risk of using it. It may not be stable, operate correctly or work the way the final version of the software will. It should not be used in a production environment. The features and functionality in the prerelease software may not appear in the final version. Some product features and functionality may require advanced or additional hardware, or installation of other software.
Windows Developer Preview with developer tools English, 64-bit (x64)

DOWNLOAD (4.8 GB)
Sha 1 hash – 6FE9352FB59F6D0789AF35D1001BD4E4E81E42AF
All of the following come on a disk image file (.iso). See below for installation instructions.
64-bit Windows Developer Preview
Windows SDK for Metro style apps
Microsoft Visual Studio 11 Express for Windows Developer Preview
Microsoft Expression Blend 5 Developer Preview
28 Metro style apps including the BUILD Conference app

Windows Developer Preview English, 64-bit (x64)

DOWNLOAD (3.6 GB)
Sha 1 hash – 79DBF235FD49F5C1C8F8C04E24BDE6E1D04DA1E9
Includes a disk image file (.iso) to install the Windows Developer Preview and Metro style apps on a 64-bit PC.

Windows Developer Preview English, 32-bit (x86)

DOWNLOAD (2.8 GB)
Sha 1 hash – 4E0698BBABE01ED27582C9FC16AD21C4422913CC
Includes a disk image file (.iso) to install the Windows Developer Preview and Metro style apps on a 32-bit PC.

Live SDK

The Live SDK provides a set of controls and APIs that enable applications to integrate Single Sign On (SSO) with Windows Live ID and access information from SkyDrive, Hotmail and Windows Live Messenger. To learn more, sign up for our technical preview.

System Requirements

Windows Developer Preview works great on the same hardware that powers Windows Vista and Windows 7:
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
To run Metro style Apps, you need a screen resolution of 1024 X 768 or greater

Notes about installing the Windows Developer Preview

You can’t uninstall the Windows Developer Preview. To reinstall your previous operating system, you must have restore or installation media.
Install on: Windows Developer Preview with developer tools Windows Developer Preview (32-bit or 64-bit)
Windows 7 and Windows Vista Clean install only You can keep accounts, files, and settings
Windows XP Clean install only You can only keep accounts and files
A clean install is supported on all builds. You will only receive the full set of installation options when setup is launched in Windows.