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I'm new on Ubuntu. I've got a Toshiba L845 (that comes with W8 pre-installed) and after having so many problems I decided to go to Linux.

I do not want to keep W8 (since I can not even start it due to a blue screen error that cost U$S 400 to be fix according to toshiba).

I've been trying to install Ubuntu through USB. I have correctly "burn" the ISO in another computer and have fixed all the UEFI and Secure BIOS issued.

The copy boots perfectly, but on the main menu of the installation when I click on "Install Ubuntu" the computer keeps restarting all the time. It comes up with the Ubuntu installation menu and then it restarts again and again.

Does someone have the same problem? What can I do to fix it? Please consider that I have no access to Windows. I just have my USB stick and the computer.

Santiago Ferrari González
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The fact that somebody's asking $400 to fix a blue-screen problem in Windows suggests the possibility that the computer has a hardware fault. That's far from certain, though (you haven't said how much diagnosis went into this repair estimate). If I had to guess, I'd say you might have a damaged hard disk. You can check this by running a SMART test, as described here.

You can determine your boot mode by looking for a directory called /sys/firmware/efi -- if it's present, you've booted in EFI mode; if it's absent, you've booted in BIOS/CSM/legacy mode. If my bad-disk hypothesis is correct, this detail is irrelevant; but if something else is going on, knowing the boot mode may be important. Changing the boot mode might or might not be possible, depending on how you created your USB drive. If it is possible, it will be done by using the firmware's built-in boot manager (typically accessed via a function key as the computer starts) and selecting the appropriate boot option -- the description of the boot medium usually includes "UEFI" to boot in that mode and omits "UEFI" to boot in BIOS/CSM/legacy mode.

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Rod Smith
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