Hello all!

I need a little expertise on Dual booting Windows 10 and kali.

A little background knowledge:

My laptop came with Windows 8 preinstalled. I successfully dualbooted kali and Windows at that time, and I proceeded recently to udgrade to Windows 10. Still no problems.
I then decided to do a completely fresh install of Windows 10, and therefore i deleted all partitions and made some new ones for both Windows and kali.
I then installed Windows 10.
So once again I went on to install kali 2.0 on the new partition i made, but this time, during installation, it doesnt detect my Windows 10 OS when I am about to install grub. It says though that grub can later be manually configured to boot into other OS's.

Afraid that grub wont see my Windows 10 OS, I choose not to install grub to the MBR, but now i obliously dont get the chance to boot kali.

My question is now:
How do I install grub so that i will be sure i can boot into both Windows and kali now?

If i do install grub, and it somehow doesnt show Windows, how do I then get it to? Manually make an entry in /etc/grub.d/40_custom?

Any help is greatly appreciated! So thanks in advance! :-)