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Possible Duplicate:
12.10 UEFI Secure Boot install
Installing Ubuntu on a Pre-Installed UEFI Supported Windows 8 system

When ever I try to boot from a dvd for 12.10, an error messages shows that says that the system was unable to boot windows. This laptop is a dell insipron 15x, it came installed with windows 8, is there any one who has had this problem before and can help.

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marked as duplicate by Ringtail, hhlp, Jorge Castro, Eric Carvalho, Eliah Kagan Jan 23 '13 at 9:08

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

Maybe you have to turn out «Secure Boot» (at the bottom of this manual: – wolfv Jan 22 '13 at 1:39

What is happening is that you are not booting from Ubuntu. I'm not sure why Windows is complaining that you have a boot disk for Ubuntu, however.

To boot from Ubuntu, when you first start up your computer, there is something called a BIOS. This is the first screen you see when you start your computer; it should show a Dell logo (as you are on a Dell Inspiron). There, you should see text say "Press F for more boot options" or something like that. On the top of your keyboard you should have those F-Keys, or function keys. Press the corresponding key, and you should be lead to a window where you can select which volume you should boot from. Select the correct one, and Ubuntu will boot.

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Re previous answer - I have a Dell Inspiron 1545 and the key to press when the Dell Logo appears at boot up is F12. You should see various boot options - top will be HDD - Boot from DVD should be further down the list. Click on that. – JohnBUK Jan 22 '13 at 10:52

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