Install operating system on Rock Pi x

[Dante4]

Please reformat your message a bit. This wall doesn’t really help with understanding what kind of problem you have.

1. You formatted emmc with pre-installed Windows 10 (?)
2. You tried to install some OS (which one?) on RockPiX
3. You tried Microsoft msdn version of Windows 10
4. You flashed iso file on emmc with windows 10 (???)

Maybe you have met this kind of problem

Concerns with ROCK Pi X soldered eMMC

In the case of UEFI, it’s possible (and even likely) that when the OS is installed, instead of storing the EFI binary at ESP:/EFI/BOOT/BOOTX64.EFI, it stores it at ESP:/EFI/OS-NAME/name.efi and adds an entry to the NVRAM with the location of the binary. If the eMMC gets removed, and the board gets turned back on, the bios will fail to locate this storage location and promptly remove it. Hence, it’s no longer able to find the OS. I would test this theory, but my board is out of commission for s…