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.
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.