Windows 7 Windows 7 goes into Restarting Loop after installing Windows 10

Hi, everyone.

Trying to fix this issue already 2nd day and I realize that I need more help.

My windows 7 was installed on Samsung SSD. I recently got Crucial SSD and decided to install Windows 10 as second OS.

Before installation I decided to change my Windows 7 disk from MBR to GPT using MiniPartition Wizard Tool. After that Windows 7 successfully loaded so I went ahead with installing Windows 10.

I installed Win 10 to Crucial SSD. Successfully logged in to Windows 10 and did all the updates.

After that I restarted and chose Windows 7. And it went to a black screen after which it started to restart.

What I did so far.

Unplugged all other HDD and SSD. When I am trying to load it gives me an error 0xc000000e.

It tells me to add the SSD with Win 10.

I tried to load from Windows 7 installation disk, but it gives me error:
"This version of System Recovery Options is not compatible with the version of windows you are trying to repair. Try using a recovery disc that is compatible with this version of windows."

The disk has Win7 x64 which is installed on my Samsung SSD.

I started command prompt from Win 10 repair:

I did diskpart -> assign letter--> cd/ d command, however when I got to bootrec /fixboot - it gave me access denied

Even though I changed to GPT, I tried to do fixmbr command. It said it was successful. I did rebuild bcd, but it told me I have 0 installations.

Any way I can fix it from inside Windows 10?

I also have another old SSD that has the same copy of Windows 7. That SSD was getting bad and I cloned the OS. Can it somehow help me to fix booting Windows 7 on Samsung SSD?