The information IS detailed, and Correct.
There is no need to switch between Normal, or Selective Startup, and in
fact, each time you alter that, whatever you have changed on the 'startup
tab' will be altered. If you have Normal selected you will have tons of
things loading when you start your pc, in fact everything you have will load
at startup. If you have 'selective' then, pick only those you want at
startup, hit okay, and leave it. Do not put it back to normal mode. That
only negates your 'selective startup' choices and reverts back to loading
everything at startup. Yes, you will, every time you make a change to that,
get a message the next time you start your computer reminding you of your
changes. If you don't want to be reminded, hit 'don't show this message
again' However, if you make another change after that, you will, again, get
that message.