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I have 2 SSDs, one 256gb and one 24gb. On the 256gb drive I have Windows 8 installed. On the 24gb I have Ubuntu 12.04 installed.

When I hit F12 on my keyboard during startup, I am taken to the boot manager of my system where I have the following options:

The boot manager options

Why are there two entries for Ubuntu when I have only the one installation and how can I remove one? When I try to boot into "Ubuntu" (the third option), the screen turns off.

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Was Windows 8 preinstalled? How did you install Ubuntu? – Eero Aaltonen Jan 28 '14 at 10:46
Windows 8 was installed from a bootable USB (EFI) I made with diskpart prior to installing Ubuntu. And Ubuntu was installed in a similar fashion immediately after I finished installing Windows: I loaded it onto a USB (following a guide on and booted into the live Ubuntu and installed from there. I didn't shrink or touch the Windows partition. The OS'es were installed on each their own physical drive. – transporter_room_3 Jan 28 '14 at 15:17

I had a similar problem and I resolved it using Boot-Repair. There are only few simple steps to follows: first of all I created a bootable usb-stick (this is not the only way) with the iso of Boot-Repair.

Then I restart my pc (with the usb inserted), and I follow some simple and automatic steps of Boot-Repair.

I'm not an expert, so if you prefer, you can wait for other answers.

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Will this affect the boot manager (which I am inclined to believe is part of the UEFI firmware)? If I select the first or the second option from the boot manager, the systems boot perfectly. – transporter_room_3 Jan 28 '14 at 15:32
In a quick search I saw this and this. Maybe this could answer to you (or at least give some useless informations). – amorvincomni Jan 29 '14 at 9:26

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