Windows 10 build 9900

10.0.9900.0.fbl_awesome1501.141201-2124
	Build of Windows 10
OS family	Windows NT
Version number	10.0
Build number	9900
Build revision	0
Architecture	x86, x64
Build lab	fbl_awesome1501
Compiled on	2014-12-01
Expiration date
Timebomb	2015-04-15 (+135 days)
About dialog

Windows 10 build 9900 is a build of Windows 10, which was uploaded to BetaArchive on 29 January 2015.^[1] It is the earliest available build of Windows 10 to be compiled in the fbl_awesome1501 branch.

Editions and keys[edit | edit source]

Edition / SKU Name	Key
Professional	NKJFK-GPHP7-G8C3J-P6JXR-HQRJR
ProfessionalWMC (edition upgrade only)	GBFNG-2X3TC-8R27F-RMKYB-JK7QT
Enterprise	PBHCJ-Q2NYD-2PX34-T2TD6-233PK

New features and changes[edit | edit source]

User interface[edit | edit source]

As part of an effort to fully remove the Charms bar, the Settings charm has been removed. Changes have also been made to the privacy page during the OOBE.

Charms bar

The title bar of Metro applications has been updated, with it now featuring a new caption button design that would be applied system-wide in build 9913. A dedicated button for maximizing Metro apps into full screen has also been added, instead of being in the menu brought up by the toggle.

Metro application example
Ditto, build 9883

The "Welcome to Tech Preview" desktop shortcut has been removed. Additionally, the taskbar design has been updated, adopting a flatter design and a dark opaque color scheme. However, the system tray icon outline when an icon is hovered over retains its Windows 7 design. The Security and Maintenance flyout, alongside with its corresponding taskbar tray icon, has been removed.

Tablet Mode has been introduced, which can be activated through the Shift+⊞ Win+` key combination and clicking on the pop-up notification. Currently, only titling windows is possible, and the tablet-specific taskbar seen in later builds has not yet been implemented.

Tablet Mode

Additionally, new desktop wallpapers and themes are also included.

After merging the following registry entry, the date/time flyout becomes inaccessible. This could potentially suggests that a new redesign for the flyout was on the works, but requires extraordinary means to be enabled.

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\ImmersiveShell]
"UseWin32TrayClockExperience"=dword:00000000

The search function on taskbar is now largely finalized, allowing users to search for files in addition to applications and settings. While Cortana is accessible, it cannot be used at this time because the servers it depends on have went down long ago.

Cortana
Cortana settings
Taskbar search

Applications[edit | edit source]

Several legacy applications have been removed, which include the legacy version of the Calculator app and Windows Easy Transfer. In addition to this, three new applications has been added, which is the Insider Hub, Windows Feedback and Remind Me applications

Windows Feedback
Insider Hub
Remind Me - Main page
Remind Me - Create reminder page

The home page of the Settings app has been revamped, which resembles the Category View in Control Panel. Additionally, as an effort to fully replace the legacy Control Panel program with the new Settings app, background settings have been added to the Personalization page. Option to change feedback frequency has been added, as well as the addition of a new Windowing page. Buttons for full-screen dialogs (ex: Refresh your PC) have also been made wider.

Main page
Background page
Feedback page
Windowing page

The Windows Update page in Control Panel now tells the user to use the Settings page for Windows Update instead.

Windows Update in Control Panel

The Devices Flow application has been updated, with it now being docked to the right side of the screen instead of appearing in a window. However, it is largely unstable and tends to crash immediately upon opening it.

Devices Flow/Connect sidebar

Floppy disk drive support[edit | edit source]

Readded support for floppy disk drives after its removal in build 9785.

Bugs and quirks[edit | edit source]

User interface[edit | edit source]

When window auto-colorization is enabled, the borders of window thumbnails on the taskbar remain unchanged in color, even when the wallpaper is changed. This problem can be resolved by either manually adjusting the window color via the Control Panel or by performing a restart.

The search feature is unstable and tends to crash if the searched word does not match with any query. Additionally, the XAML start menu is now inaccessible and attempting to enable it results in the start menu being unable to open.