If virtual optical drives remain problematic, creating a bootable USB drive can bypass CD/DVD-related errors entirely:
Open PowerShell as Administrator (search “PowerShell” > right-click > Run as Administrator). Run the following commands: windows 11 cannot connect unattendediso to cd dvd 2 better
In VirtualBox settings, try disabling EFI under the "Motherboard" tab. If virtual optical drives remain problematic, creating a
Confirm target device exists
– This isn’t a standard Windows tool or feature. You may be referring to an unattended installation ISO (automated Windows setup) or a tool like AnyBurn, ImgBurn, PowerISO , or CD/DVD drive emulation software . If virtual optical drives remain problematic
Windows 11 often defaults to NVMe for the primary drive in VirtualBox. While fast, the unattended script sometimes struggles to attach secondary ISOs to NVMe controllers. Go to .
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