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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:

  1. 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)

  2. 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.

Thank you,
BR
Johan

TheOdd
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Johan
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2 Answers2

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It looks as if this question has been resolved in the comments.

Yes it turned out that I had installed Ubuntu in legacy mode :( Very well nothing to do but reinstall it then I guess. Thanks for the help! – Johan

Zanna
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TheOdd
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The problem was just like CelticWarrior mentioned that my ubuntu installation was installed in Legacy mode. After reinstalling it in UEFI mode everything now works. GRUB bootloader shows up and my Windows 10 installation now boots again.

Johan
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