Windows 8 build 8437.1 (fbl_dev_dp8)

Build of Windows 8
Release nameDeveloper Preview 8
OS familyWindows NT
Version number6.2
Build number8437
Build revision1
Build labfbl_dev_dp8
Compiled on2012-06-21
Expiration date
Timebomb2013-01-15 (+208 days)
RT (CoreARM)
Product key
About dialog
Windows RT-6.2.8437.1-Winver.png

Windows 8 build 8437.1 (fbl_dev_dp8) is the official Developer Preview 8 build of Windows 8. Several images of this build running on a Qualcomm Snapdragon S4 (APQ8060A) mobile development kit were first shared online on 9 August 2023; the full build was later shared in the form of a WIM image dump by Chinese website BetaWorld on 21 August 2023.[1]

This build uses production code signing and can be booted on the current date.

Changes[edit | edit source]

Desktop Gadget Gallery removal[edit | edit source]

The Desktop Gadget Gallery was removed from the operating system due to remote-code execution vulnerabilities which were disclosed in a security advisory weeks later on 10 July 2012,[2] additionally complimented by a package that respectively disabled the Windows Sidebar and Desktop Gadget Gallery functionalities on Windows Vista and Windows 7.[2]

Miscellaneous[edit | edit source]

Bugs and quirks[edit | edit source]

Built-in development tools[edit | edit source]

This build's image dump includes a set of development tools primarily targeted towards Qualcomm hardware and driver development. In particular, the Windows\Setup\scripts directory includes the following customizations and additions for the operating system:

  • Scripts for provisioning the associated development kit that the build originated from
  • Internal Qualcomm documentation for Secure Boot enablement, along with an early Secure Boot Debug Policy dated 16 May 2012 and a debug policy installer application from build 6.2.8432.0 (winmain.120611-1243)
  • The Windows App Certification Kit from its earlier winmain compile
  • Remote Tools for Visual Studio 2012, build 11.0.50623.2
  • Windows Device Console from build 6.2.8522.0 (win8_rtm.120721-1642)
  • Original WinJS AppX dependency packages from build 8377, and the AT&T Communications Manager (presumably required for mobile operator testing)
    • Windows PowerShell commandlets for Add-AppDevPackage
  • Firmware for the Sierra Wireless AirPrime MC7700 modem, version
  • NVIDIA Tegra 3 Cardhu development kit-related specifics which were unintentionally included as part of the image; relies on the presence of a nvidia.txt text document in the script folder root to install
    • Icera modem firmware (revision 3.00_9.2) and factory testing utilities
    • Board power configuration
  • The respective Camera and Reader applications from builds 8514 and 8513 (win8_rtm)

Gallery[edit | edit source]

Interface[edit | edit source]

Built-in development tools[edit | edit source]

Images published prior to upload[edit | edit source]

Development kit photographs[edit | edit source]

Interface[edit | edit source]

References[edit | edit source]