Can not boot into Windows after deleting Ubuntu boot partion

I used to install Ubuntu in another hard disk (hdd) that dual boot with my Windows 10 OS(ssd), but i’ve deleted the Ubuntu partition on hdd by disk management of Windows.

I sometimes need to disassemble my PC in order to do some upgrade or repair. Once issue is that, after disconnect and reconnect the ssd, my BIOS turned me to bash-like GNU Grub. I followed the guide: https://youtu.be/zmabgSwH2d4

and I can boot into Windows. But after restart, it still led me to GNU Grub, there’s no choice that I need to boot manually like the link above.

Next, I following the guide: https://askubuntu.com/questions/429610/uninstall-grub-and-use-windows-bootloader in order to remove ubuntu boot partition that left me only two options: Windows and boot options like the top-voted answers. Nevertheless, after restarting, there’s no GNU Grub bash-like, but I got stuck in loops: ‘System BootOrder not found. Initializing defaults. Reset system’.

How can I fix this? Thank you very much

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Answer

DaveM121

Independent Advisor

Hi HungDuyBK,

I am Dave, I will help you with this.

You will need to create a bootable Windows 10 USB on another working PC, then follow the steps provided by Kyhi on the link below to recreate a new EFI partition

https://www.tenforums.com/installation-upgrade/...

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