[ubuntu] Erased Ubuntu Entry in Grub menu

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http://ubuntuforums.org – I am running 12.04 and after doing some updates I ran grub customizer to clean up the grub menu. I swear I only unchecked Linux entries with old kernels, but when I restarted the only grub choice is for the windows 7 partion. Could someone help me boot into Ubuntu! Thanks! (Hardware)