I had Arch Linux installed, but for some reason the partition where the OS was, got deleted. I also had Windows 7 Ultimate on another partition and the GRUB menu use to show it. After my Arch install was deleted, I installed Linux Mint Cinnamon 18. And since then my Windows 7 Ultimate is not showing up GRUB menu. What should I do?
Give Boot-Repair a try. I had similar problems in the past and resolved it with Boot-Repair.
Start up Mint
$ sudo add-apt-repository ppa:yannubuntu/boot-repair $ sudo apt-get update $ sudo apt-get install -y boot-repair && boot-repair
Then follow the recommended instructions from the above link.