I used to run dual booting Ubuntu with Windows 10 with no conflicts at all for over a year now. The Grub Boot-loader was Ubuntu's.
I decided to install Kali Linux to fulfill triple booting for educational purposes. The issue is the default Grub loader now is Kali's and it's only showing Ubuntu & Kali Linux.
After trying Gparted and disk listing I realized that windows 10 is still there safely.
I remember choosing to install Kali Linux's grub boot-loader at the installation which said that it detected Ubuntu & Windows 7. Then it over-wrote Ubuntu's grub and windows isn't accessible anymore.
I am new to Kali but I know one thing. I would probably get windows 10 Back if I can install Ubuntu's boot-loader back as the default grub. Any idea how to perform this? Or what would the best solution be with regard to this case?
I also had UEFI as the default boot method from the BIOS but switching it with Legacy back and forth makes no difference.