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.

You can obtain an ISO copy of Windows 8 Developer Preview ( the full time-limited beta version ) via the following links ( scroll down for system requirements ) :

Windows 8 Developer Preview (with Developer Tools ) , 64-bit (x64) , English

DOWNLOAD ( 4.8GB ) , which includes :

- 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 8 Developer Preview only , 64-bit (x64) , English

DOWNLOAD ( 3.6GB ) , which includes :

- 64-bit Windows Developer Preview

Windows 8 Developer Preview only , 32-bit (x86) , English

DOWNLOAD ( 2.8GB ) , which includes :

- 32-bit Windows Developer 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