First, you need to clarify if you understand how to have a dual boot installation. Have a look here:
The MBR of what disk?
That’s a good indication Windoze and Linux have been installed in different modes, your Windowze looks to be installed in UEFI mode, your Linux seems to be installed in BIOS mode. A boot of both systems from grub menu is impossible, both OS must be installed in the same mode. There are two options:
a) Keep changing OS via firmware boot
b) Reinstall one system in the mode of the other system