Windows 10 build 9834

6.4.9834.0.fbl_partner_eeap.140908-0936
	Build of Windows 10
OS family	Windows NT
Version number	6.4
Build number	9834
Build revision	0
Architecture	x86, x64, ARM32, ARM64
Build lab	fbl_partner_eeap
Compiled on	2014-09-08
Expiration date
Timebomb	2015-04-15 (+219 days)
About dialog

Windows 10 build 9834 is a pre-Technical Preview build of Windows 10. Screenshots of this build were originally shared on 11 September 2014^[1], followed by a video of this build the same day.^[2] The full build was later shared online as an x64 version in the Simplified Chinese language on 8 December 2014, followed by x86 versions and other languages later on. The Windows Driver Kit and Assessment and Deployment Kit for this build, which additionally contains ARM32/ARM64 components and a Preinstallation Environment image of this build's ARM64 architecture compile, were uploaded onto the Internet Archive on 20 February 2023.^[3]

This build was originally released to Microsoft partners participating in the Ecosystem Engineering Access Program (EEAP), as indicated by the fbl_partner_eeap branch.

Editions and keys[edit | edit source]

Edition / SKU Name	Key
Core	334NH-RXG76-64THK-C7CKG-D3VPT
Professional	XHQ8N-C3MCJ-RQXB6-WCHYG-C9WKB
ProfessionalWMC (edition upgrade only)	GBFNG-2X3TC-8R27F-RMKYB-JK7QT

Bugs and quirks[edit | edit source]

Timebomb[edit | edit source]

Like other builds found in the fbl_partner_eeap branch, this build uses a test-signed certificate and as a result can be installed on the current date. However, installing this build on the current date disables the ability to change the desktop wallpaper in the Control Panel.

Display drivers[edit | edit source]

Installing NVIDIA drivers on the x64 version of this build breaks DWM, resulting in a black screen. Older NVIDIA devices and drivers before 2012 are able to function correctly with DWM disabled.

AMD drivers do not appear to be affected by this issue.
A similar bug has also been discovered when installing Intel HD graphics drivers.

`explorer.exe` error during shutdown[edit | edit source]

When the system shuts down, a memory access error related to explorer.exe may occur.

On-screen keyboard[edit | edit source]

On touch screen devices, on-screen keyboard pops-up only in certain programs. Restarting Windows Explorer can fix this bug.

Remote Desktop Connection[edit | edit source]

The Remote Desktop Connection client is prone to crashing at random intervals.

Incorrect window thumbnail border color[edit | edit source]

If window auto-colorization is enabled, the window thumbnail borders on the taskbar do not change color even after the wallpaper changes. This issue can be remedied by manually changing the window color through the Control Panel or restarting Windows.

Windowed Metro applications[edit | edit source]

Occasionally, the Desktop Window Manager (DWM) may fail to correctly skin the title bars of windowed Metro apps such as Settings. This results in the title bar appearing with the Windows Basic theme rather than the Aero theme. Quitting and restarting the affected application will resolve the issue.

Persistent Snap sizing[edit | edit source]

When using snapping a window to the left or right side of a user's monitor, the window will remain at the snapped size even when it is brought out of that snap.