Animal Crossing 3DS.com

Hi,

I have created and uploaded a power point presentation with imbedded audio into moodle.  The presentation opens in a separate window when opened by a course enrollee.  Is there any means of prevent the power point from being downloaded? The presentation is copyrighted, a fee is charged each enrollee and I am interested in protecting the presentation from being downloaded by an enrollee who then shares it will other individuals who do not pay to take the course?

Please help.

I didn't find the right solution from the Internet.

References:-
https://moodle.org/mod/forum/discuss.php?d=83022
Infographic design studio


Thanks