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VirtualBox fails with "Inaccessible Boot Device" BSOD
(05-13-2017, 04:20 PM)admin Wrote:
(05-13-2017, 12:03 AM)marcelser Wrote: Hi,

I was unsuccessful trying to run my WinToUSB stick's image in Virtualbox so far (obviously I don't know how to correctly set it up, for example where to put the boot partition etc.).

So I though let's try the Windows To Go Upgrader because it does exactly what I need, creates a VirtualBox Image from the WinToUSB Stick. So I downloaded it and started the "check for upgrade" with a "Windows 10 Pro (x64)" GPT/UEFI WinToUSB enabled USB Stick. The process starts and creates the VM and tries to start it. At first I see the virtualbox logo and the turning dots at the bottom which everyone knows, but after about 5-10 seconds I get a BSOD saying "UNMOUNTABLE_BOOT_VOLUME". So, question is, whe isn't it able to boot? I'm using Virtualbox 5.1.20.

I would be even be willing to pay if I can boot the WinToUSB image so I can modify it. And it also seems that other people are having also big problem to boot a WinToUSB volume in Virtualbox if you look into the forum threads about WinToUSB.

Any help would be greatly appreciated.

Best regards,


Unmountable boot volume error is usually caused by corruption of files on the disk or corruption of the file system, so please make sure that the Windows To Go drive is not damaged and can boot normally then try again.

Please boot into Windows on the USB drive, run chkdsk to scan volume C: and other partitions on the USB drive and to see if there have file system errors. If Yes, fix and try again.

For more infomation about chkdsk,  please visit:

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RE: VirtualBox fails with "Inaccessible Boot Device" BSOD - by admin - 05-13-2017, 04:40 PM

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