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Troubleshooting “No Bootable Medium Found” Error in VirtualBox

Many VirtualBox users have experienced at least once the message ‘FATAL: Could not read from the boot medium! System halted.‘ Sometimes it is also shown ‘No Bootable Medium Found! System halted‘. This error is more common when trying to start a new virtual machine, but it is not impossible to happen at an existing virtual machine if the virtual hard drive is missing.