Installed Zorin on separate HD in my desktop. Had to use Grub for dual boot Win10 and Zorin. When i went to pull the Zorin 500gb HD my Win10 on 1tb NVME M2 drive would not boot. So apparently Zorin copied my EFI partition of windows to the Linux drive so my Win10 no longer had a boot partition on my NVME M.2 drive. After 12hrs and many different software i found a solution. I have not seen this problem or solution anywhere else on this forum is the reason for the post HERE. I had to recreate the EFI boot partition on my NVME Win10 drive because during the Zorin install Grub took over booting via Dual boot, but did not leave windows boot partition in place.
Resolution
To resolve the issue, create a new EFI system partition on the SSD, which is Disk 2 in this example.
To create the EFI boot partition, one of the partitions (e.g., C:\ ) on Disk 2 needs to be shrunk by 100 to 200 MB. The entire procedure can be completed using the command-line. Follow the steps below:
From an admin Command Prompt, run the following commands:
diskpart
select volume C
shrink desired=150
create partition efi size=150
format fs=fat32 quick
assign letter=Y
list vol
exit
Important: Do not proceed to the next command if a command fails to execute correctly.
Next, to copy the boot files and create the Boot Configuration Database (BCD) file, run the following:
bcdboot C:\Windows /s Y:
You should see the output “Boot files successfully created.”
(In the above example, C:\ is where Windows is installed, and Y:\ is the drive letter we assigned for the EFI system partition.)
That’s it. The above steps create the EFI partition on Disk 2, where the OS partition (C:\ drive ) exists.
Open Disk Management. You should see the newly created EFI system partition on Disk 2. You can now physically remove Disk 1 if you don’t need it.
Link to the Website: https://www.winhelponline.com/blog/create-move-efi-partition-windows/#comment-184759
I still use Zorin as a Vitural machine in my Virtual Box for now.
Hope this saves someone some time.
Istilldontlikecomputers.
