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I'm trying to install ubuntu 12.04 using USB. After downloading the ISO file, I used pendrive to make bootable USB drive but after restarting my computer, I encounter this error:

Unknown keyword in configuration file: ... vesamenu.c32 : not a COM32R image boot:

I need your help as soon as possible.

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1. Make sure the iso is not corrupt. 2. Give more details on how you created the bootable USB drive. – To Do Aug 5 '12 at 20:31

You may try making your bootable USB flash drive using UNetbootin.

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