Windows 10: Need to change boot loader from external HDD to Internal SSD

So today I used WinToUsb to install another version of windows on to my external hard drive and formatted as GPT. I wanted a dual boot system. Installation went smooth and I was able to boot from my external hard drive that has Windows 10 Enterprise, the SSD has Pro.

Later on after I rebooted I could not boot from my original operating system on my SSD even if I change the boot order in my BIOS. I have exhausted my self in looking for a solution, including using EasyBCD / MiniTool Partition Wizard Free 12.1.

Using EasyBCD get access back into my original OS by adding a new entry, however once I load back into windows 10 pro on my SSD, IF my External HDD is NOT plugged in via USB or removed my whole PC crashes and that's because I think the main bootloader is on the external HDD.


WinVer 1909 (OS Build 18363.1237) (External HDD)












DISK 1 WDC = My main SSD with all my stuff on it
DISK 2 970 EVO= Nvme that I installed somewhile ago for more storage, I tried to create a EFI system partition and transfer the bootloader my self to the 970 evo but I failed.
DISK 3= The Windows to USB that I made and now my bootloader has somehow transfered to this external drive and I can not boot my PC unless this external drive is plugged in!

If anyone can please help or steer me in the right direction I would really appreciate it, I'm not an expert or even intermediate at solving things like this, but I tried to give as much info as possible.

Thank you!

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Basically I can't use my system anymore unless my external hdd wintousb system is plugged in via usb *cry
if it's not plugged in and I go to bios I am just told to insert repair disk and I don't have one and If I did I wouldn't want to wipe all my data

:)

 

How to Change Boot Disk from Internal HDD to External SSD

Thanks. Am planning to but just want to make sure the SSD boots before making it internal.

 

HDD to SSD change in OEM windows 10 laptop

You mean like this article says, the enter BIOS and boot from USB , then use tool to clone external USB connected HDD to internal SSD, Please confirm.

v4: Create a bootable Windows PE USB stick (v4, Windows PE)

 

How to Change Boot Disk from Internal HDD to External SSD

If I were you, I'd remove the SSD from the enclosure and replace the HDD in the PC. You'll get the most speed advantage that way. You probably can then put the original HDD in the enclosure and use it as n external device.