Disable welcome animation on Windows 8/10

[Wenzel]

Hi !

would it be possible to speed up the build process for Windows 8/10 by disabling the annoying welcome animation ?

I searched a bit and found that the key EnableFirstLogonAnimation was controlling this behavior.

From this site
I tried:

reg.exe add "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon" /v EnableFirstLogonAnimation /d 0 /t REG_DWORD /f

in the Autounattended.xml, but it doesn't work.

Any ideas ?