As per observation interactive startup should work just by pressing 'I' at the startup.
But it is not different from using 'ntsysv' command at the command prompt. With the 'Interactive' option you can enable/disable daemons at the startup.
If you are not getting interactive mode, you can try 'ntsysv' instead.
(It is available script in RedHat releases, presuming it is available across other distributions too.)
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