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I am a new user, and I may have completely screwed up my computer trying to install Ubuntu 13.04. I'm working from a liveUSB, and I'm pretty sure I accidentally uninstalled Windows 8 (which is what my computer came with - now the computer doesn't recognize any boot device without the USB inserted), and now the computer simply won't boot. When I start the computer with the liveUSB inserted, I am taken to a page headed "GNU GRUB version 2.00-13ubuntu3", which allows me to select "Try Ubuntu without installing" or "Install Ubuntu," and I've already installed it - if I try to install again, it gives me the option of installing alongside Ubuntu 13.04 or replacing it, so I am pretty sure it installed the first time but it just won't boot. I then used Try Ubuntu and followed the instructions under 2nd Option on this page: https://help.ubuntu.com/community/Boot-Repair

I tried rebooting, and it didn't work - I just went back to the "GNU GRUB version 2.00-13ubuntu3" menu once again. The url from my boot-repair attempt is http://paste.ubuntu.com/6030961

I know this is very chaotic, and I am in way over my head, so any help/advice would be much appreciated!

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Have you turned secure boot off in UEFI. And then from UEFI menu does it not boot ubuntu entry. Or do you get black screen which is another issue - video. With 16GB SSD, is this an Ultrabook? Then you probably need nomodeset on grub menu linux line, but have to hold shift key (or escape) to get grub menu. –  oldfred Aug 27 '13 at 4:16
    
Yes, secure boot is off, and I don't see anything about ubuntu in the UEFI menu - it's set now to "EFI USB1 PATH1 (Lexar USB Flash Drive). When I press enter (or exit for that matter) from the UEFI menu it just goes back to the grub menu with only the following options: try ubuntu, install ubuntu, OEM install, check disc for defects. And the computer is a Dell Inspiron 15R. –  Sofia Prado-Irwin Aug 27 '13 at 6:21
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