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Solution: The installer used BIOS USB emulation. After booting into ArcaOS, you need the native USB driver stack. If you can’t control the system, boot from the ISO again, choose "Maintenance Shell," and manually copy USBD.SYS from the ISO to C:\OS2\BOOT. arcaos 50 6 iso install download
Since ArcaOS is closed-source commercial software, there is no "free download" option. The ISO file is hosted on a private client portal. Ignore websites offering "arcaos 50 6 iso install