I've been trying to install Catalyst Control Center for my laptop that has Radeon HD7650M. But I just keep bumping into the following error.

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An unresolvable problem occurred while initializing the package information.

Please report this bug against the 'update-manager' package and include the following error message:
E:Encountered a section with no Package: header, E: Problem with MergeList /var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_quantal-security_universe_i18n_Translation-en%5fUS, E:The package lists or status file could not be parsed or opened.

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I googled around and found some remedies that involved "sudo rm..." but that did not work, and the console said that such command was not found. What am I supposed to do? What have I done wrong? Thanks.