In May 2007, Bowen commissioned a "Top to Bottom Review" of California's electronic voting systems, to determine their security. On August 3, 2007, Bowen withdrew approval and certification and conditionally re-approved three electronic voting systems (Diebold Election Systems, Hart InterCivic, Sequoia Voting Systems), and rescinded approval of a fourth system, (Election Systems & Software), after the top-to-bottom review of the voting machines found the machines to be highly insecure. For these efforts she was awarded the Profile in Courage Award by the John F. Kennedy Presidential Library and Museum.