For ColdFusion 6 MX, ColdFusion 7 MX, and ColdFusion 8:
- Stop the "ColdFusion MX Application Server" Service
- Open the "neo-security.xml" file contained at %CFMXInstallRoot%\lib
- Find the line: var name='admin.security.enabled'
- boolean value='true' and change the true to false, then save the file
- Start the "ColdFusion MX Application Server" Service
- Go to the ColdFusion Administrator again and set a password (http:\\localhost\administrator)
To set the password
Go to 'Security' --> CF Admin Password
Enable 'Use a Cold Fusion Administration Password'
Set the password --> Submit changes