Hi,
Those folders are primary folders for Windows to operate a
user account or multiple user accounts. If you don`t want
anyone to use your computer but you, then I recommend you
do a few things (if you haven`t already)
First create an account for you and give yourself admin
right, also create a tough password, preferrably a complex
one. Second, rename the administrator account and give
that one a complex password as well. As long as no one
can access your account or the default (renamed) admin
account, they can not create an user account on your
notebook.
As for organizing your accounts. All data you save is in
your profile or private folders you created. Most
programs are shortcuts and stuff is usually based in the
administrator account. So to keep it easy, save
everything in your My Documents folder and just keep that
organized.
Jeff