Windows Installation animation

January 16, 2022 in Archaeology, Windows 10, Windows 11

While looking at \Windows\system32\oobe\ files I had a quick check what FirstLogonAnim.exe does and discovered that on top of accepting the following command line arguments:

  • /zdp (for Zero Day Package)
  • /oobe
  • /oobetransition
  • /existinguser
  • /explorer

it can be run with /RunFirstLogonAnim as a first argument and in such case will launch the ‘Windows installation’ animation. If both /RunFirstLogonAnim and /explorer are present in the command line, you won’t be able to close the animation.

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