: In your VM's System settings, uncheck "Floppy" from the boot order and delete any temporary "Unattended" files in the VM storage folder before restarting. Why Unattended Installation is a "Good Feature" Despite these glitches, using an unattended ISO (or an autounattend.xml
Windows Setup inherently looks for the autounattend.xml on the first CD/DVD drive. unattended.iso from CD/DVD 2.
: Open Device Manager , right-click your DVD/CD-ROM drive, and select Uninstall device . Restart your computer to let Windows automatically reinstall the driver.
If the issue persists, Parallels support often requires a technical report to investigate specific system conflicts: Right-click the in the Dock. Select Help > Send Technical Data . windows 11 cannot connect unattendediso to cd dvd 2 better
Manual adjustment of the VM's hardware settings can often resolve mounting errors: Shut down the virtual machine. Open the . Navigate to Hardware > CD/DVD 1 (or 2).
This error typically occurs during a installation—most commonly in Parallels , Hyper-V , or VirtualBox —when the software fails to mount the secondary ISO (the unattended.iso ) containing your automated setup script ( autounattend.xml ).
If you encounter this error while setting up a virtual machine (VM), try these common solutions: Manually Select the Image : In your VM's System settings, uncheck "Floppy"
is missing, you can skip the "Express" features and install Windows manually. Switch to Bootable USB
Q: Why is Windows 11 unable to connect an unattended ISO to a CD/DVD? A: The issue may be caused by a corrupted or incompatible ISO file, insufficient privileges, outdated or faulty drivers, or conflicting software.
Better Method 3: Utilizing Windows PE (Preinstallation Environment) : Open Device Manager , right-click your DVD/CD-ROM
The ISO is assigned to a virtual drive that the Windows 11 PE (Preinstallation Environment) cannot read before the actual drivers are loaded.
Run the setup and step through the standard Windows 11 region and account configuration screens manually. Method 2: Manually Fix the Virtual Hardware Mapping