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I'm running Ubuntu 16.04 and Windows 10 on 2 separate hard drives (no partitions, 2 physical hard drives).
Two things have happened:
I no longer get the GRUB boot loader screen which allows me to choose which operating system I boot into (I recall that this used to work under a similar setting running Linux Mint 15 and Windows 7)
Suddenly Windows 10 won't boot anymore. Even though I set it as the first drive to boot from in the BIOS.
What am I doing wrong here? I've seen some stuff about installing ubuntu in uefi mode. Is that something I need to consider? I am fairly new to Ubuntu and a complete noob when it comes to setting up partitions, etc.