Now notice the size of the System partition (e.g. At command prompt give the following commands in order (press enter after each command)Ĥ. At the Windows Setup screen press SHIFT + F10 to access command prompt, or choose Next –> Repair your computer –> Troubleshoot –> Advanced Options –> Command Prompt.ģ. (After fixing the boot configuration and if the Guest OS is UEFI then proceed to re-enable UEFI. * Note: If the VM machine doesn't boot from the ISO file, go to VM Settings > System > Motherboard and disable EFI. Follow the steps in method-1 above to attach a bootable Windows ISO file on the virtual machine and boot the virtual machine from the ISO file. * Note: This error sometimes occurs if the Virtual Disk (VHD/VHDX) is damaged, or after converting a physical disk to a virtual disk/image (VHD/VHDX) with the Disk2vhdtool.ġ. Repair Boot Configuration Data using BCDBOOT tool.Īs I mentioned above, the VirtualBox fatal error "No bootable medium found", can appear if the GUEST OS doesn't have a valid boot configuration.* At such a case you have to repair the boot files on the virtual disk in order the VM machine to start without errors. If the problem persists, disable the EFI support in VM settings and continue to the next method. Here ensure that the Hard Disk is checked and is the first boot device, and at Extended features check the following two (2) options and click OK:ģ. Open the VM Settings and go to System > Motherboard.Ģ. Windows 10/11), proceed to enable the UEFI feature in VirtualBox, otherwise skip to next method.ġ. If the virtual disk contains a UEFI based OS (e.g. Enable UEFI support in VirtualBox machine. Finally, follow the onscreen instructions to install the operating system on the VM machine. … go to System and drag Optical to the top (in order to boot the VM from the attached bootable ISO file), and click OK.Ĩ. After attaching the iso file on the Storage devices on the VM machine…ħ. Then select the iso file and click Choose.ĥ. the "Windows.iso" file in this example)Ĥ. Click Add and open the bootable ISO file with the OS that you want to install (e.g. Click the 1st plus ( +) button next to Controller to add optical drive.ģ. Open the Settings of the VirtualBox machine and go to Storage.Ģ. * Note: If the VM's virtual disk already contains an Operating System, skip to Method-2.ġ. ISO file with the operating system that you want to install, and proceed to install the OS. So, if you just created the VM machine and you haven't installed an operating system, attach a bootable. In order a virtual machine (VM) to work, you have to install an operating system on it. Install an Operating System in the VirtualBox Machine.
How to FIX: FATAL: No bootable medium found! System halted in VirtualBox. This tutorial contains detailed instructions to troubleshoot the "No bootable medium found” error in VirtualBox.
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