Windows 10 build 9900

Windows 10 build 9900 is a build of Windows 10, which was uploaded to BetaArchive on 29 January 2015.https://www.betaarchive.com/forum/viewtopic.php?f=2&t=33509 It is the earliest available build of Windows 10 to be compiled in the fbl_awesome1501 branch.
== Editions and keys ==
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==
=== User interface ===
As part of an effort to fully remove the Charms bar, the Settings charm has been removed. Changes has also been made to the privacy page during the OOBE.
File:Windows10-10.0.9900-CharmsBar.png|Charms bar
The title bar of Metro applications has been updated, with it now features a new caption buttons 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 staying in the menu brought up by the toggle.
9900-RemindMeHome.png|Metro application example
9883Settings b1.png|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. 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 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.
File:Windows10-10.0.9900-Tablet-Mode.png|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.
File:Windows10-10.0.9900-Cortana.png|Cortana
9900-CortanaSettings.png|Cortana settings
9900-Searching.png|Taskbar search 
===Applications===
Several legacy applications has been removed, which includes 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
9900-WindowsFeedback.png|Windows Feedback
9900-InsiderHub.png|Insider Hub
9900-RemindMeHome.png|Remind Me - Main page
9900-RemindMeCreate.png|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.
File:Windows10-10.0.9900-Settings.png|Main page
9900-SettingsBackground.png|Background page
9900Settings-Feedback.png|Feedback page
9900Settings-Windowing.png|Windowing page
The Windows Update page in Control Panel now tells the user to use the Settings page for Windows Update instead.
File:9900wucpl.png|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.
File:9900-DevicesFlow.png|Devices Flow/Connect sidebar
==Bugs and quirks==
===User interface===
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.
==Gallery==
File:Win8boot.png|Boot screen
File:Windows10-10.0.9900-Setup.png|OOBE
File:Windows10-10.0.9900-LockScreen.png|Default lock screen
File:Windows10-10.0.9900-LoginScreen.png|Default login screen
File:Windows10-10.0.9900-LockScreenNew.png|Revamped lock screen 
File:Windows10-10.0.9900-LoginScreenNew.png|Revamped login screen
File:Windows10-10.0.9900-StartMenu.png|Start menu
File:Windows10-10.0.9900-NotificationCenter.png|Notification center
File:Windows10-10.0.9900-TaskView.png|Task view 
File:Windows10-10.0.9900-IE.png|Internet Explorer 11 (with About dialog)
File:Windows10-10.0.9900-ThumbBorderError.png|Incorrect window thumbnail border color
File:9900-Demo2.png|Demo
==References==
Category:Windows 10 builds