Dual Boot ended up in a big mess

I have:
1 SSD 860EVO that is Disk 0 with Windows 10 Pro. The first partition no drive letter 100 MB Healthy (EFI System Partition), My PC (C:) 930.90 GB NTFS Healthy (Boot, Page File, Crash Di,[, Basic Data Partition), last partition no drive letter 500 MB Healthy (Recovery Partition)

1 Samsung 2 TB HHD that is Disk 1 used for Backup (I:) 1331.22 GB free of 1863.01 GB NTFS

1 Samsung 1TB HHD that is Disk 2 931.51 GB Online was divided into 4 fairly equal partitions.
E: My Documents 336 GB free of 490 GB,
F: My Downloads 22.3 GB free of 98.5 GB, (was originally much larger before the DB install)
G: Program Apps 57.2 GB free of 60.2 GB,
H: Website Files 160 GB free of 242 GB
now (F:) is as shown below:
The Zorin installer took Disk 2 F: My Downloads and split it as follows:
between E: & F: have 8 MB Unallocated,
between F: & G: have 8 MG Free Space,
between G: & H: have (J:) 513 MB Fat32 Healthy (Logical Drive) & (new partition no drive letter) 39.31 GB Healthy (Primary Partition) ending with H:

After the install finished I restarted it and it was showing the Dual Boot Menu with several Zorin choices and the last choice is C: Windows 10. After playing around with Zorin I clicked on Restart and selected Windows 10. It would not boot into Windows ending up booting back into Zorin. Tried it several times. I had to warm boot and F12 then selected C: to get back into Windows 10.

Where is this dual boot menu installed? I assume I can just delete the added partitions (in some certain order and merge) used by Zorin, how do I get all this back where Windows 10 will boot, and in what steps?

What I want to do is remove Zorin 16 Pro & put Disk 2 back as it was. Need help here so Windows 10 will boot.

Install Zorin 16 Pro on Disk 0 to share equal space with C: Windows 10. After getting Z16Pro working will delete windows and use its space as needed.

How did this happen, I was very careful to select Disk 0 to dual boot. It was easy to see SSD 860 from the Samsung HDD drive. Is this going to happen again if so I can unplug this disk while doing the install?

I have tried to include everything in great detail. I have a good working knowledge of Windows and barely know anything dealing with Zorin so please don't leave out the newbie steps. I do know what a terminal is and how to type code in one that about it. I am not giving up this time if there are drivers for all my devices.

Thanks

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