Hello everybody!

I have both installed OS on my laptop: Windows 10 and Fedora 27.
How can I find in a less painful way for encrypt both Systems? I know that Windows 10 has built-in tools - Bitlocker, but I'm not sure that it will not spoil grub and fedora.

Also i want encrypt my already installed Fedora OS. The new installation is not suitable for me, since I have a lot of my settings.