Windows 8 build 8061 (fbl core1 soc)

Windows 8 build 8061 (fbl_core1_soc) is a late Milestone 3 build of Windows 8, released to partners participating in the Ecosystem Engineering Access Program on 9 August 2011.
Four screenshots of this build's x86 checked/debug compile in the Prerelease SKU were first shared to the BetaWiki Discord on 29 May 2020; a WIM image dump of a Surface RT containing the ARMv7 compile of this build's Ultimate SKU was later shared on 19 May 2023,https://archive.org/details/6.2.8061.0.fbl_core1_soc.110803-1830_ARM32_WIMDump followed by a staged WIM image of this build's Prerelease N SKU on 28 January 2024. The original partner drop for both the retail and debug client releases of this build's unstaged ARMv7 installation media and Preinstallation Environment, including software development kits and raw symbol sets, were eventually uploaded on 13 July 2024, while this build's x86 counterpart original partner drop was uploaded on 19 October 2024. This is the last known build to use the Windows 7 branding on the system properties.
It is notable for being one of few Windows builds to be made available in the form of unstaged installation media; all client editions available in the Windows 8 source tree at the time of compilation (albeit labeled as Longhorn, a holdover that was never corrected internally) are available for the user to pick from and install during setup, in turn building a complete Windows image from scratch from a set of components through the use of the Windows Component-Based Servicing (CBS) stack.
The initial available copy of this build's ARMv7 Ultimate SKU image was assembled from scratch via unstaged installation media, utilizing the Preinstallation Environment for build 8175.5 to facilitate the install.
== Editions and keys ==
The following SKUs are installable in this build:
Edition / SKU Name 	Key
Starter 	
Starter N 	
Home Basic 	
Home Basic N 	
Home Premium 	
Home Premium N 	
Professional 	
Professional N 	
Enterprise 	
Enterprise Evaluation 	
Enterprise N 	
Enterprise N Evaluation 	
Ultimate 	
Ultimate N 	
Developer Preview (Prerelease) 	
Developer Preview N (PrereleaseN) 	
Developer Preview ARM (PrereleaseARM)	
== New features and changes ==
=== Interface ===
The start screen's default layout has been updated to feature a new set of pinned applications.
A new splash screen icon and major revisions to the descriptions of certain options (and their sections) in the Immersive Control Panel have been introduced, and slight design changes have been made towards the Windows Store application, primarily the addition of a back button in the main user interface as well as an updated application tile design. The touch-optimized Remote Desktop Connection client has been rebranded to simply Remote Desktop and its overall color palette and splash screen updated, although functionality largely remains identical.
Immersive modal dialogs now carry the background color of the user's chosen accent color by default.
=== Miscellaneous ===
* The background color seen when bugchecks are invoked has been changed to cerulean, making the overall design now largely reminiscent of the one found within the RTM build.
* An issue with the Microsoft Basic Render in ARM32 builds 7996-8038 (where the text has some black stuff around it) has been fixed in this build. 
== Compatibility ==
This build contains ARM Cortex-A9 timer hardware abstraction layer extensions for the NVIDIA Tegra 2/3 systems-on-a-chip and the Texas Instruments OMAP4 SoC line. A HAL extension for the ARM SP804 dual timer is also included.
USB 2.0 kernel debugger extensions for the Tegra and OMAP4 SoCs are also available out-of-box, but are untested as of writing.
== Patched/modified files ==
The following modified files are present in the initial ARM32 image dump:
* winload.efi is from 6.2.8129.0 (fbl_core1_soc.111006-1700) and additionally has had signature checks patched out. This is because the EFI firmware parameters substructure of the boot library (passed to the entry point of a boot application) was later changed in build 8112 (fbl_core1_soc); attempting to load older boot applications in a boot manager from builds 8112 onward (or vice versa) will result in a crash due to differing element offsets. The patched binary allows the build to be booted using a production-signed boot manager (using donothingpolicy.pol and NOINTEGRITYCHECKS enabled in the machine's boot configuration data).
** The original binary from build 8061 is located in Windows\WinSxS\Backup\arm_microsoft-windows-b..vironment-os-loader_31bf3856ad364e35_6.2.8061.0_none_e22fc5a8e03359c9_winload.efi_75834aa0
* acpi.sys is from 6.2.8129.0 (fbl_core1_soc.111006-1700) (unmodified, valid signature). The ACPI implementations in builds 8061 through 8112 (fbl_core1_soc) are not compatible with Surface RT hardware, and therefore require a binary replacement to function properly on such hardware.
** The original binary from build 8061 is located in Windows\WinSxS\arm_acpi.inf_31bf3856ad364e35_6.2.8061.0_none_a991cf7a419448c9\acpi.sys
* partmgr.sys has two jumps patched to prevent functions from returning STATUS_MEDIA_WRITE_PROTECTED. The original version is still in the Drivers directory, named partmgr.old.
* testplugin.dll is signed by a certificate chain named DesktopApp. This file can be restored to its original state by removing the signature.
None of the above modifications are required to boot this build under QEMU, however hal.dll will have to be patched in order to recognize the emulated timers.
== Emulation ==
== Bugs and quirks ==
=== SD bus driver write protection (Surface RT)===
MultiMediaCard-based storage mediums (such as Secure Digital (SD) cards and eMMCs) are mounted by the operating system as read-only/write-protected file systems on the Surface RT; the build must therefore be booted under a non-MMC medium such as an external USB mass storage device or a Hyper-V virtual hard disk (VHD) image. To mount the eMMC as a read-write filesystem, the sdbus.sys function SdhcIsWriteProtected must be patched to return 0 (and the PE checksum fixed); patch file offsets 0x138 and 0x6c24 to db e2 01 and 00 20 70 47, respectively. This issue does not happen under emulation.
=== Windows Setup ===
Rendering artifacts may appear on the product key page during the out-of-box experience.
=== Applications ===
* Windows Runtime applications' titles are not printed correctly and instead spew the full application user model ID (AumId).
=== Desktop Window Manager ===
* Disabling and re-enabling composition and then invoking the left-hand Charms menu may cause the Desktop Window Manager to crash and generally destabilize unless the right-hand Charms bar is invoked.
=== Miscellaneous ===
* Attempting to shut down the system may cause the system shell to crash with an invalid memory read exception if the user never exits out of the start screen first presented to the user under a redpilled environment.
* Logging off might result in a DRIVER_OVERRAN_STACK_BUFFER bugcheck. 
===ARM32-compile specific===
====Applications====
* Chess Titans and Mahjong Titans will fail to launch as the respective English language pack resources for the built-in Windows 7 premium games are not present in the image.
* Newly loaded web pages rendered by Internet Explorer may often use the wrong background colors, presenting shades of random colors in place of the standard white.
* Turning on administrative tools in the start screen preferences sub-menu within the Settings charm causes the Explorer shell to crash.
====Desktop Window Manager====
* Desktop Window Manager software-based compositing does not work by default as the underlying implementation always assumes all built-in GPU drivers to be incompatible, unless a Terminal Services client such as Remote Desktop is used. The main DWM executable dwm.exe can be patched to force render even with incompatible hardware. A workaround is discussed in the above patching guide.
* The DWM software renderer implementation in this build is subject to major performance issues and may end up becoming out-of-sync with the actual desktop session. Disabling window animations may help improve performance at the cost of visual quality.
* Animations in the Start screen may not complete properly.
====Miscellaneous====
* This build cannot be powered off normally as it hangs during the shutdown process. Manually hold down the power button to power off the device instead. Shutting down can also sometimes result in a BAD_POOL_CALLER bugcheck.
== Gallery ==
=== ARM32 compile ===
File:Windows8-6.2.8056-Boot.png|Boot screen
Windows8-6.2.8061.0-StartMenu.png|Start menu
Windows8-6.2.8061.0-SystemProperties.png|Control Panel system properties section
Windows8-6.2.8061.0-InternetExplorerRenderBug.png|Internet Explorer webpage rendering bug
Windows8-6.2.8102-BSOD.png|System crash
=== Setup and OOBE ===
Windows8-6.2.8061.0-SetupHWDetect.png|Hardware detection (second phase of setup)
Windows8-6.2.8061.0-OOBERegionSelection.png|Region and language settings
Windows8-6.2.8061.0-OOBEComputerNameNonRP.png|Computer name
Windows8-6.2.8061.0-OOBEProductKey.png|Product key entry
Windows8-6.2.8061.0-OOBEEULA-NONRP.png|End-user license agreement
Windows8-6.2.8061.0-OOBEAccountNonRP.png|Account credentials
Windows8-6.2.8061.0-OOBEUpdatesNonRP.png|Windows Update settings
Windows8-6.2.8061.0-OOBETimeDateNonRP.png|Time and date settings
=== Redpilled state ===
Windows8-6.2.8061.0-LockScreenRP.png|Lock screen
Windows8-6.2.8061.0-LogonScreenRP.png|Logon screen
Windows8-6.2.8061.0-StartScreen.png|Start screen
Windows8-6.2.8061.0-StartScreenSmallApps.png|Start screen in semantic zoom mode
Windows8-6.2.8061.0-StartScreenUserTile.png|User tile dropdown menu
Windows8-6.2.8061.0-Desktop-RP.png|Redpilled desktop
Windows8-6.2.8061.0-CharmsMenu.png|Left-hand charms menu
Windows8-6.2.8061.0-CharmsBar.png|Charms bar
Windows8-6.2.8061.0-VanUI.png|View Active Networks UI
Windows8-6.2.8061.0-WindowsExplorerRP.png|Windows Explorer
Windows8-6.2.8061.0-MiniTaskmgrRP.png|Task Manager in compact mode
Windows8-6.2.8061.0-TaskmgrRP.png|Task Manager in advanced mode
Windows8-6.2.8061.0-ImmersiveControlPanel.png|Immersive Control Panel
Windows8-6.2.8061.0-ImmersiveIE.png|Immersive Internet Explorer 10
Windows8-6.2.8061.0-WindowsStore.png|Windows Store
Windows 8-6.2.8061.0-BootIM.png|Boot options
==== Metro OOBE ====
Windows8-6.2.8061.0-OOBEProductKeyRP.png|Product key entry
Windows8-6.2.8061.0-OOBEEULARP.png|End-user license agreement
Windows8-6.2.8061.0-OOBEOnboardingRP.png|Initial onboarding animation
Windows8-6.2.8061.0-OOBEComputerNameRP.png|Personalization
Windows8-6.2.8061.0-OOBEPrivacySettingsRP.png|Privacy settings
Windows8-6.2.8061.0-OOBEPrivacySettingsAdvancedRP.png|Advanced privacy settings
Windows8-6.2.8061.0-OOBEPrivacySettingsAdvanced-2RP.png|Ditto.
Windows8-6.2.8061.0-OOBEPrivacySettingsAdvanced-3RP.png|Ditto.
Windows8-6.2.8061.0-OOBERegionSpecificRP.png|Region and language settings
Windows8-6.2.8061.0-OOBEAccountCredRP.png|Account credentials
Windows8-6.2.8061.0-OOBEFinalizeRP.png|Finalization
=== x86 compile ===
==== Free variant ====
=====OOBE=====
8061x86fre-redpilledoobe1.png|OOBE, redpilled
8061x86fre-redpilleddobe2.png|Personalize
8061x86-redpilledoobe3.png|Express settings
8061x86-redpilledoobe4.png|Network settings
8061x86-redpilledoobe5.png|OOBE settings, page 3
8061x86-redpilledoobe6.png|OOBE settings, page 4
8061x86-redpilledoobe7.png|OOBE settings, page 5
8061x86-redpilledoobe8.png|Log on
8061x86-redpilledoobe9.png|Log on options
8061x86-redpilledoobe10.png|Log on via local account
8061x86-redpilledoobe11.png|Post-OOBE
=====Desktop=====
8061x86fre-lockscreen.png|Lock screen
8061x86fre-redpilleddesktop.png|Desktop with Redpill enabled
8061x86fre-startscreen.png|Start screen
8061x86fre-charmsbar1.png|Charms menu
8061x86fre-charmsbar2.png|Charms bar
8061x86fre-pcsettings.png|Immersive Control Panel
==== Checked variant ====
Windows8-6.2.8061-Debug-EntNEval-SystemProperties.png|Redpilled System Properties (Enterprise N Evaluation)
8061Nchk-systemproperties.png|System Properties (Developer Preview N)
8061Nchk-aboutIE.png|About Internet Explorer
8061Nchk-redpilledexplorer.png|Windows Explorer
8061Nchk-unredpilledexplorer.png|Redpilled Windows Explorer
8061Nchk-unredpilledwinver.png|winver (Developer Preview N)
8061Nchk-redpilledwinver.png|Redpilled winver (Developer Preview N)
===== Screenshots uploaded prior to publication =====
Windows8-6.2.8061.0-Desktop-x86.png|Desktop
Windows8-6.2.8061.0-ControlPanelKBLayout-x86.png|Control Panel and keyboard layout picker
8061-x86chk_desktop.png|Watermark
8061-x86chk_winver.png|winver
== Notes ==
== References ==
Category:Windows 8 builds