A. The National Computer Security Center (NCSC) is the United States government agency responsible for performing software product security evaluations. These evaluations are carried out against a set of requirements outlined in the NCSC publication Department of Defense Trusted Computer System Evaluation Criteria, which is commonly referred to as the Orange Book. Windows NT has been successfully evaluated by the NCSC at the C2 level as defined in the Orange Book however to confirm you system meets the criteria to be C2 compliant you should use the C2CONFIG.EXE utility supplied with the Windows NT/Windows 2000 resource kit.
Double clicking on an open lock will result in the program offering to resolve the issue, for example disabling the OS/2 subsystem.