I have a problem when trying to set up dual boot (Windows 10 + Linux Mint 17) in UEFI mode or on a GPT disk.
I cannot go back to using the default Windows 10 boot manager?
In Legacy mode or on MBR usualy I used EasyBCD.
How can I go back to the default Windows 10 boot manager on this Windows 10 & Linux installation, on my UEFI+GPT formatted drive, and keep Windows 10 as the first and default option?
bcdedit
or EasyUEFI in Windows,bcfg
in an EFI shell, orefibootmgr
in Linux. These tools will enable you to set the Windows boot manager as the default. From there, configuring the Windows boot manager to chainload to GRUB (or whatever you're using to boot Mint) is a separate question. I know next to nothing about configuring the Windows boot manager, so I can't comment on that. There are numerous alternatives, though; see my Web page on the subject.