Hi all, I recently installed Linux Mint Cinnamon 17.2 on a secondary hard drive on my Dad's computer to try and open him up to the idea of Linux. The OS installed just fine and both looks and runs great. The only problem is that now I can't boot into the Windows 7 Partition on the primary hard drive. I can tell that partition has not been erased yet because I checked in GParted and the sda primary hard drive is still written with two ntfs partitions and the sdd secondary hard drive contains the partitions for linux mint. I know that this is something that I will need to change in GRUB but I am unsure of how to add this partition to GRUB. It's late now so I cannot post the exact directory of the filesystem for Windows 7 but it is on sda. Any help with this situation would be very much appreciated.

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Great news!! I found my solution through this guide and I used the sudo nano command to make the edits. Thank you so much again everyone for all of your help!

From a terminal run this and reboot - it should add Win7 automatically.

I gave that a try and am afraid it didn't work still only getting Linux Mint boot options

In case these help make the situation more clear
Windows Hard Drive in Gparted
Linux Mint Hard Drive in Gparted

Check your Links and uploads.

Your link to the GParted info on windows is broken. Check it and post again.
Did you check the /boot/grub/grub.cfg file to see if you have an entry for windows there and if so, what it is?

You might also boot Mint and go to the site below, download and run boot repair. Make sure you only select the option to Create BoofInfo Summary and post it or a link to it here. It will provide more details and someone should be able to help.

https://help.ubuntu.com/community/Boot-Repair

Whoops sorry about that, that's what I get for using Dropbox for links :P
Here they are on Imgur:
http://i.imgur.com/TdiqtJA.pngWindows 7 Hard Drive in Gparted
http://i.imgur.com/CLervBx.pngLinux Mint Hard Drive in Gparted

Again, "Did you check the /boot/grub/grub.cfg file to see if you have an entry for windows there and if so, what it is?"

If you don't see an entry for windows, it obviously won't boot. Most of the time Grub will detect a windows partition as long as the windows drive is attached during the install. If not, the suggestion above to run update-grub will usually do the job. Since that doesn't work, more information will be needed which is why I suggested you run the boot repair selecting the Create Bootinfo Summary option. This will output a file you can link to this site or post here and will have more detailed information and someone should then be able to advise you.

Your link to the GParted image for the windows drive does show the windows boot and system partitions.

Strictly speaking, grub doesn't care - but it will use os-prober to do the job if it's installed. Which it should be on a default Mint system. In addition to the above, what does this get