[SOLVED] Trouble with GRUB re-installation

[technomancer]

For Wirezfree

Hello Wirezfree,

I am sorry for not telling you the whole story but I guessed you would catch the clue
by reading what gold_finger answered me.
Given there is Windows 7 installed on the machine, you install Lite beside it, putting
GRUB on MBR, so you will have a dual boot install with Lite first on the booting list as
I already wrote you before and Windows second.
Afterwards you install Mint putting its GRUB on its / and NOT on MBR. You open up your
terminal giving the command  sudo update-grub
and that 's it. You got the triple booting machine you wanted. 

I use this same method and it works ! After installing another OS, boot to LinuxLite and- sudo update-grub
Just remember if you want to triple boot, quad boot, etc.-> to always install grub to the root ( / ) of the drive you installed to. (linux)
I am booting 7 OS's using this method and multiple Hdd's.
I have multiple hdd's with win7,xp, 8 and linux (several versions) and use LinuxLite grub as the main bootloader.
If you break the boot, there is a guide here to get it setup again.

* side note- you must have windows installed FIRST to any HDD in order to have no issues. It's A nightmare if you reverse the order.