Windows 10 build 9821
| Build of Windows 10 | |
 | |
| OS family | Windows NT |
|---|---|
| Version number | 6.4 |
| Build number | 9821 |
| Build revision | 0 |
| Architecture | x64 |
| Build lab | fbl_partner_eeap |
| Compiled on | 2014-08-20 |
| Expiration date | |
| Timebomb | 2015-02-15 (+179 days) |
| About dialog | |
  | |
Windows 10 build 9821 is a build of Windows 10, which was originally released to Microsoft partners participating in the Ecosystem Engineering Access Program (EEAP), as indicated by the fbl_partner_eeap branch. Polish website WinClub.pl published a screenshot of this build on 18 September 2014.[1] The build was later uploaded publicly on 11 May 2020.
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]
Setup[edit | edit source]
The Windows logo displayed in the autorun is heavily brightened and utilizes a grey background not matching with the purple one of the application.
Metro UI[edit | edit source]
Dragging a window in full-screen mode in Metro apps will result in Metro UI transitions from Windows 8.1.
Internet Explorer[edit | edit source]
F12 Developer Tools may fail to launch.
explorer.exe error during shutdown[edit | edit source]
When the system shuts down, a memory access error related to explorer.exe may occur.
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.
Taskbar Language Bar[edit | edit source]
The language bar is not displayed on the taskbar, but however the old language bar is working properly.
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.
File operation window metrics[edit | edit source]
The file operation progress window (which appears while copying, moving, and deleting files) may not extend automatically when more than one operation is in progress.
Closing notifications in the Notification Center[edit | edit source]
When swiping away all notifications from a system tray application, particularly the Action Center, explorer.exe will crash.
Gallery[edit | edit source]
Boot screen
Setup
Start menu
Start screen
Search and Cortana
Metro visual artifacts
Incorrect file operation window metrics
explorer.exeerror during shutdown
Incorrect taskbar preview border color
Image posted by winclub.pl prior to being shared
Action center
