* Disk 0 - It is a HDD. It's partition style is Master boot record. (**MBR**) It's the disk in which I wanna install Linux and dual boot.
* Disk 1 - It is a SSD. It's partition style is GUID partition table. (**GPT**) It's the disk in which Windows 10 is installed.
* My BIOS mode is UEFI (seen in sys info)
* Secure Boot is disabled (seen in sys info)
* Both of the disks are basic.

![Image of my disk management](https://i.stack.imgur.com/xqNaD.png)

Till here everything is understandable by me. But here comes booting and EFI, UEFI, BIOS, Legacy and all that. When I was watching how-to YouTube videos, I saw a tool mentioned many time, that was **EasyBCD**. So, I installed it and it started with a message box saying EFI Bootloader detected. I clicked Help, rather than helping it created more confusion. You can also check it: [EasyBCD and UEFI](https://neosmart.net/wiki/easybcd/uefi/)

In the "Option 1" section. It was saying

> 
> However, your Windows installation is already in UEFI/GPT mode, and UEFI installations of Windows cannot be booted via the legacy MBR approach!
> 
> 
> 

There were pairs like legacy/MBR, EFI/GPT, BIOS/MBR, EUFI/GPT. So does that mean booting works in pairs?

And if BIOS is has two modes: UEFI and Legacy, so why do I hear that BIOS and UEFI are the two modes?

And what's the difference between EFI and UEFI ?

Please help me dual booting I'll be thankful to you.