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The Dell Inspiron 15-5559 is approximately 15 inches in width and 9 inches in height. This device has a 15.6 inch screen and an Intel 7 Core Processor. The Dell Inspiron 15-5559 comes in a variety of colors that include blue, silver, dark grey, white, and black.

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Operating System loader has no signature. Incompatible with secure boo

Operating system loader has no signature. Incompatible with secure boot. All Bootable device failed secure boot verification.

Risposto! View the answer Anch'io ho questo problema

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Tried installing your laptop?

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Batterie per PC portatili

Una soluzione semplice per un grande aumento di potenza.

Acquista ora

Batterie per PC portatili

Una soluzione semplice per un grande aumento di potenza.

Acquista ora

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Soluzione Prescelta

Try pressing F2 on bootup and then go into set and turn SecureBook off. That should let it boot up fully.

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No Bootable device found.

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Can you verify that the HD is good?

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No bootable devices found.... how to fix it?

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1. How is disabling SecureBoot a "solution"? and 2. It didn't work anyway. Confirmed that there's no issue with the hard drive. Does anyone have any other suggestions?

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bro i also had the same problem but i tried it by my own method

when you turn on press F12 as the moment you see dell symbol

Then i dont rember the exact but select last option below bios setup

then after reaching there ther will be futhur two option you try both one at a time while doing this you will see dell  warning to change that setting but you do that .It worked for i too search the  whole internet but didnt found the solution anywhere  but this my method worked  for me hope it  will work for you

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Raman. sarà eternamente grato.
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