Windows 10 build 9780

Build of Windows 10
OS familyWindows NT
Version number6.3
Build number9780
Build revision0
Build labfbl_partner_eeap
Compiled on2014-06-22
Expiration date
Timebomb2015-07-15 (+388 days)
About dialog
TCB.png TCBGallery.png

Windows 10 build 9780 is the earliest available build of Windows 10, which was uploaded to BetaArchive on 26 January 2019. This build was originally released to Microsoft partners participating in the Ecosystem Engineering Access Program (EEAP), as indicated by the fbl_partner_eeap branch.

Due to its earliness, this build identifies itself as Windows 8.1 in many areas and still bears the 6.3 kernel version.

Editions and keys[edit | edit source]

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

New features and changes[edit | edit source]

The ability to query ReFS volume information has been added to fsutil.

Start menu[edit | edit source]

A new Start menu has been introduced, merging the Windows 8 and Windows 7 styles. The Start screen from Windows 8.1 can be brought back when enabling the full screen option in the Start Menu Properties.

Window animations[edit | edit source]

DWM-based window animations (particularly when opening and closing windows) have been changed to simpler transitions.

Jump Lists[edit | edit source]

The Jump Lists appearance on the taskbar now changes color according to the user's accent color. However, restarting explorer.exe will revert it to window coloring.

Desktop backgrounds[edit | edit source]

This build retains the same set of desktop backgrounds as Windows 8.1, except that img0 and img1 backgrounds have been swapped, resulting in Windows 8.1's img1 becoming the default background.

File Explorer[edit | edit source]

File Explorer received a new page called Home, which opens when the user launches the app.

PC Settings[edit | edit source]

  • The option to enable Battery Saver has been added to PC Settings.
  • The "Flights" page has been added, which would later be used for configuring Windows Insider builds.

OneNote[edit | edit source]

The Metro OneNote app from Windows 8.1 Update 1 is no longer installed by default.

Hidden features[edit | edit source]

Windowed Metro applications[edit | edit source]

This build introduces native support for Metro apps in windowed mode, which is disabled by default. It can be enabled by merging following registry setting:

Windows Registry Editor Version 5.00


However, title bars will use the same style as Win32 applications. Also, the feature itself has bugs.

Search[edit | edit source]

This build includes a nonfunctional Search utility, which is disabled by default. It can be enabled by merging following registry setting and restarting File Explorer:

Windows Registry Editor Version 5.00


Bugs and quirks[edit | edit source]

Installation[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.

Compatibility[edit | edit source]

Attempting to install this build through VMware Workstation by using the Easy Install mechanism will lock the newly created user account out with a password expiration warning. It can be remedied by adding a password to the user during the VM creation process.

Taskbar preview border color[edit | edit source]

If window auto-colorization is enabled, the taskbar preview borders 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 by restarting Windows. This bug persisted until build 9909.

Safe mode[edit | edit source]

Trying to boot into safe mode (whether via System configuration tool or Recovery Options) results in a black screen.

Start menu[edit | edit source]

While opening the start menu with no apps pinned, having the taskbar on the right of the screen can result in the start menu floating in the middle of the screen.

Gallery[edit | edit source]

Setup[edit | edit source]

Interface[edit | edit source]