Windows 8 build 8509

Build of Windows 8
OS familyWindows NT
Version number6.2
Build number8509
Build revision0
Architecturex86, ARM32
Build labfbl_eeap
Compiled on2012-07-08
Expiration date
Timebomb2013-01-15 (+191 days)
RT (CoreARM)
About dialog

Windows 8 build 8509 is a pre-RTM build of Windows 8, which was released to Microsoft partners participating in the Ecosystem Engineering Access Program (EEAP). It was first shown running on a Lenovo ThinkPad Tablet 2 reviewed by tech review website Booredatwork.[1] The ARM32 compile of this build in Hebrew language was later uploaded to the Internet Archive on 20 February 2023.[2]

This build includes Microsoft Office 2013 build 4128.1015 (HomeStudentPre edition) preinstalled, with setup files residing in the \MSOCache directory. It is the last available build of Windows 8 to feature the Windows wordmark on the boot screen, as the next set of builds would change it to instead use the final RTM design, which simply features the 2012 Windows logo.

Similarly to the unidentified December 2011 build, build 8375, and build 8504, despite not being publicly released by Microsoft, the standard set of built-in Metro applications is included by default.

Changes[edit | edit source]

User interface[edit | edit source]

Accent color[edit | edit source]

The default accent color has been changed to a distinct purple. This change was also similarly observed exclusively in the WinPE setup packages for earlier builds, such as build 8441.

Sleep lock timeout[edit | edit source]

The toggle to switch between a requiring a password when waking a device from sleep has been replaced with a sleep lock timeout, in an effort to reduce the chances of malicious actors from quickly gaining access to user data from stolen PCs. The option is variable, and the timeout can be modified to automatically lock the user's device for every 1 to 15 minutes of inactivity.

The timeout can be changed from the Immersive Control Panel user interface.

Gallery[edit | edit source]

ARM32 compile[edit | edit source]

Interface[edit | edit source]

x86 compile (unreleased)[edit | edit source]

References[edit | edit source]