Best way to restore ChromeOS with FULL ROM?

System Details

  • Device: MARASOV
  • OS: FydeOS, Kubuntu 26.04
  • Firmware Type: UEFI Full ROM
  • Firmware Version: MrChromebox-2603.1 (04/09/2026)
  • Internal storage type: NVMe (if applicable)

Summary of the Issue

I installed UEFI full ROM from MrChromebox. I like that it’s a UEFI PC now, but I long for ChromeOS back, I did install FydeOS, but it’s not the same, please do not mention restoring orginal firmware, I lost my backup and wish to still have the potential for Windows. FydeOS is fine, but there was a Chromebook Plus exclusive wallpaper I liked, and you need to pay to upgrade FydeOS to a newer Chromium release

“please don’t tell me the one way to do what I’m asking”

ok.