Windows 10 copy on external USB disk boot problem

OK, this is now more a technical experiment, but may be useful getting it done properly and fully working some time in the future.

I have been copying a whole Windows 10 Pro disk into another hard disk on an USB disk enclosure with EaseUS Partition Master.

Then when trying to boot from the USB enclosure hard disk, the first thing noting to be missing was the activation of the booting partition, so, I did it with Diskpart and it seemed being valid on the Disk Management.

The second obstacle were the wrong BCD definitions on the USB disk Boot, but they were corrected automatically for/into C: after some reboots.

Next when booting from the USB enclosure hard disk it was leading to BSOD INACCESIBLE_BOOT_DEVICE, and after the automatic reboot once again to the same.  But the second time automatic reboot did lead instead to Error 0xc0000001 and gave the chance to go with F8 to the boot definiton alternatives, and choosing there F4 the boot did lead actually all fine into Windows 10 Pro, but just in Safe Mode! But, on all the next Normal reboot trials getting once again to the INACCESIBLE_BOOT_DEVICE BSOD reboot procedure etc. as above ...

Now the question is, what is missing or wrong in all this, not getting the USB enclosure hard disk boot done straightaway in good order?

So, as a conclusion
- USB disk partition active OK
- BCD on USB disk correctly for C: OK
- Mounted Devices correct USB disk for C:
- boot into Safe Mode all OK!
- same behaviour with or without the internal hard disk in and operable
- what's still wrong or missing for Normal boot, INACCESIBLE_BOOT_DEVICE???

Thanks for any hints to be checked!
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RaminTechnical AdvisorCommented:
Did you try  Startup Repair from Advanced Options ?
Boot from Windows 10 bootable media,  Select Repair your Computer –> Troubleshoot –> Advanced options –> Startup Repair.

Also Try this:
Boot from a Windows 10 Media (DVD/USB)
Once you get the welcome screen of installation with the option “Install now”
Click on Repair your computer
From Choose an Option click on Troubleshoot
Now click on Advanced Options
Click on Command Prompt
Copy and paste:
bootrec /fixmbr
Hit Enter
bootrec /fixboot
Hit Enter
bootrec /scanos
Hit Enter
bootrec /rebuildbcd
Hit Enter.
You need to set it up differently. Windows 10 pro and enterprise allow to create a "windows to go" portable, usb-based installation of windows 10 enterprise. It is only supported on special hardware - the requirements for windows to go are quickly googled. Do you have an enterprise license
PeteVfiAuthor Commented:
OK, thanks for your comments!

-> Ramin: OK, everything done ...
Startup Repair -> Message: Can't be repaired etc.
fix/fix/scan/rebuild -> all done
All required details/routines are now in good shape, but not the Normal Boot ...

-> McKnife: Sorry, no Enterprise, just a single Pro licence ...
And, just a regular older laptop, no Surface or alike ... and, the PortableOperatingSystem is set to 0,
due to the message -> (big) Upgrades are not allowed to be installed on USB
You probably are right, Windows To Go might be the solution, but still I'm somehow hopeful for an applicable
more common detailed trick solution for this, as everything else is working fine, but not the Normal Boot ...
Acronis True Image 2019 just released!

Create a reliable backup. Make sure you always have dependable copies of your data so you can restore your entire system or individual files.

It is possible, to install windows 10 pro to usb and make it bootable, but I have my doubts that you may legally do it, since MS sells it as an enterprise feature, so I will not point you to HowTos.
PeteVfiAuthor Commented:
OK, thanks McKnife for your advices, let's see, if something will come up in few days ...
PeteVfiAuthor Commented:
OK, now, after some more days and hours, I found a fine solution to this case, with some slight limitations, namely Hasleo's WinToUSB clone/copy application -> .

During the last few days I got all the process done also with the Free version, but noted now, it may not anymore be allowed for Free(?).

In the instructions there were suggested to create/have a SYSTEM partition of 100+MB on the beginning of the USB disk, but later on I questioned it, when having some problems getting the boot procedure in good order, so, I tried and deleted that partition and moved the actual cloned Windows 10 Pro partition to the beginning of the USB disk, and then got the boot procedure working with some corrections and re-newed definitions.

After having all this USB encl. disk boot got working on the same laptop with MBR BIOS, where the original Windows 10 was cloned from the hard disk, I tried this also on 2 completely different other MBR BIOS laptops, and after boot and some devices (chipsets, etc.?) automatically re-installed in few minutes, everything worked like a charm!  But, then after when testing this same on an UEFI BIOS laptop, there were arising some problems, anyway UEFI Boot didn't accept this USB alternative at all, with or without the laptop's actual hard disk on and operable, maybe there is some way to define it, too, but, LEGACY Boot did accept. So, great! All alternative trials got working properly, if not straightaway, but somehow anyway.

But, a negative affect on this is, that the Windows Activation will be needed in short for this clone USB copy on others than the original machine!  

Here are some of the corrective actions/procedures applied during these trials:

PORTABLE OS REG KEY (may be needed to be added/changed)
-> Value PortableOperatingSystem -> portable -> 1 (non-portable -> 0)

Will be needed to set into the correct values for each machine

list disk -> sel disk x
list part -> sel part y
list vol -> check the vol letter

Change the path to C: or D: or ...

bcdedit /enum

bootrec /scanos
bootrec /rebuildbcd -> Add installation Y/N/A

and, in case, if needed
bootrec /scanos
bootrec /fixmbr
bootrec /fixboot (maybe access denied?)
bootrec /rebuildbcd -> Add installation Y/N/A

bcdedit /enum

And, here are some error repair procedures:

If error 0x0000000e ->
Installation USB/CD -> System Recovery Options -> Advanced Options -> Boot Repair
If non-repairable go on -> Advanced Options -> Command Prompt

-> C: or D: or ...
z:>bcdedit /enum

If, data store could not be opened, device cannot be found, MBR may be corrupted?,
check, if interested
chkdsk /r
sfc /scannow)

If BCD healthy, but not with correct values ->
-> C: or D: or ...
z:>bootrec /scanos
z:>bootrec /rebuildbcd -> Add installation Y/N/A

If boot not yet working, or error 0xc0000001 ->
-> C: or D: or ...
z:>bootrec /scanos
z:>bootrec /fixmbr
z:>bootrec /fixboot (maybe access denied?)
z:>bootrec /rebuildbcd -> Add installation Y/N/A

If boot still not yet working, or give an error, check further ...

Note, USB disk boot may not work, if the actual int. hard disk is still operable inside?

Go to F8 -> Start to F4 Safe Mode -> Then try to start into Normal Mode? (without int. hard disk?)

Also some other small corrective procedures were tried during all this, but do not anymore remember what they may have been ...

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"the Windows Activation will be needed in short for this clone USB copy on others than the original machine!  " - true, that's the reason why Microsoft wants only enterprise customers to use it. You can activate an enterprise key multiple times on different hardware. That can't be done with a pro key.
PeteVfiAuthor Commented:
OK, thanks for the advice, yes, understandable ...

But, OK, the main purpose of all this for me is to have an all ready back-up copy also on an USB disk, to be taken in use quickly in an emergency situation on the same machine, from which the original Windows 10 was copied/cloned, so, no activation wouldn't be needed for that.

This type of emergency case came up for me just lastly with/after the January 2018 Updates, when the machine did stop totally in 15sec. after boot, and there were found no other way to overcome or solve it, but change the machine or begin with another earlier hard disk clone back-up copy, luckily had one from some 4 months ago, but it took too long time, a day, to get and have it really in operation ...
You can do anything using a simple setup usb stick - and it's legal. You can recover files, edit the registry - anything.
If you want a full blown emergency portable windows, you will have to pay for the license - the setup disk is free.
PeteVfiAuthor Commented:
OK, thanks McKnife for the advice, but I'll try to get this applied in case so far on low level without a new licence Enterprise or Pro ...
PeteVfiAuthor Commented:
Yes, I did quite a much effort to get all this done during several days, but, of course the assisting answers did help me a few times to go to the right direction.
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