As promised, Microsoft officially released the developer preview (Pre-Beta, Build 8102 M3) version of Windows 8 during the BUILD developer conference in LA. The Developer Preview is a pre-beta version of Windows 8 for software testers and application developers. A general PC user, however, can also experience it. But you have to Keep in mind that toying with pre-beta releases is always fraught with  danger, such as unstable and unfit for daily usage. Nevertheless, if you  are really desperate to get a taste of Windows 8, I suggest you always try it on Virtual Machine such as VirtualBox. Use on production systems is NOT recommended.

Windows 8 Developer Preview (Pre-Beta) Build 8102 32 & 64 bit ISO

The released Windows 8 Developer Preview has the build version of Windows 8.8102.0.WINMAIN_WIN8M3.110824-1030, or full build string for x86 edition of version 6.2 (Build 8102.101.x86fre.winmain_win8m3.110830-1739), indicating that it’s compiled and signed off on August 30th, 2011. It is still the Milestone 3 Build supporting ARM-based chipsets along with x86 and x64 bit CPUs optimized for desktops and Tablets in all form factors.

Download Windows 8 Developer Preview ISO:

This build is available in three flavors: Windows Developer Preview English (32-bit), Windows Developer Preview English (64-bit), Windows Developer Preview with developer tools English (64-bit).  The last flavor is for application developers who want to develop apps for Windows 8. For general PC users, choose the 32 bit or 64 bit version. All these Windows 8 Developer Preview build flavors are available in ISO format and require no activation.

The downloads are available on Windows developer page. You can also use the links below to download the files directly.

– 1. Windows Developer Preview English, 32-bit (x86)

Direct Download Link: WindowsDeveloperPreview-32bit-English.iso (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.

– 2. Windows Developer Preview English, 64-bit (x64)

SHA-1 Hash: 79DBF235FD49F5C1C8F8C04E24BDE6E1D04DA1E9

Direct Download Link: WindowsDeveloperPreview-64bit-English.iso (3.6 GB)

Note: Includes a disk image file (.iso) to install the Windows Developer Preview and Metro style apps on a 64-bit PC.

– 3. Windows Developer Preview with developer tools English, 64-bit (x64)

SHA-1 Hash: 6FE9352FB59F6D0789AF35D1001BD4E4E81E42AF

Direct Download Link: WindowsDeveloperPreview-64bit-English-Developer.iso (4.8 GB)

Note: All of the following come on a disk image file (.iso): 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 and 28 Metro style apps including the BUILD Conference app.

- 4. Download Windows 8 Developer Preview Guide

Direct Download Link: Windows_Developer_Preview-Windows8_guide.pdf

This official Windows 8 Guide is released to help all Windows 8 enthusiasts to know features and improvements in the Windows 8 Developer Preview.

How to install the Windows Developer Preview from an ISO image:

The Windows Developer Preview is delivered as an .iso image that must be converted into installation media stored on a DVD or a USB flash drive. On Windows 7, the easiest way to convert this file is to use Windows Disc Image Burner. On Windows XP and Windows Vista, a third-party program is required to convert an .iso file into installable media—and DVD burning software often includes this capability.

Note: The .iso file that contains the developer tools requires a large capacity DVD called a DVD-9, as well as a DVD burner that can handle dual-layer (DL) DVDs. Most modern burners should be able to handle this format.

System Requirements:

Windows 8 Developer Preview edition works efficiently 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

Note:

  • As always, remember that this is pre-beta code and use on production systems is not recommended. Back up everything that is important to you. While we don’t expect any serious problems, regular back ups are a good thing regardless of whether or not you are using beta software.
  • Upgrade from Windows 7 installation is not supported for pre-release code; only clean installs are supported. Reminder: this is a developer preview release and is not meant for production. It is not a beta release. Microsoft will be updating the release with various quality updates and drivers over the coming weeks/months just to exercise the overall update and telemetry mechanisms.
  • As it’s a prerelease software, some features are not available yet. Shown but not in the Developer Preview release include the Windows Store, Windows Live Metro style apps, and some of the user interface features.  The focus of the preview is the API and development tools for building Metro style apps.

[Via]