Table of Contents & Download only on one computer/device

In short, I found your http://www.htmlexe.com/Home. I want to sell my ebook and it seems to me that your website has given me a solution. Therefore, I downloaded the trial edition with the intention to buy it later on. When I tried, the ebook can still be opened on any computer. What I want is actually, the purchaser of my ebook can only and only open it on just one single computer. Would you please let me know how to do it?

In addition, based on http://www.youtube.com/watch?v=COwnuiXrEYc, at minute 1:35, the table of contents is available, whereas from what I have made, table of contents can not be seen. I followed already the directions given, but still can’t make it. How to make it available?

Looking forward to hearing from you then. Thank you.

Best regards,
Chris Munthe

What I want is actually, the purchaser of my ebook can only and only
open it on just one single computer

You have two ways to do this: hardware-locked registration keys or online activation. Start to study this page: Trial and Restricted Versions

You have a working demo here if you want to use online actication for your ebooks:
http://shopdemo.htmlexe.com/

To create a trial of your ebook in order to distribute it, see this video tutorial:

if you want to go with hardware-locked keys, see About Hardware-locked Keys for Ebooks

In addition, based on http://www.youtube.com/watch?v=COwnuiXrEYc, at
minute 1:35, the table of contents is available, whereas from what I
have made, table of contents can not be seen. I followed already the
directions given, but still can’t make it. How to make it available?

See Table Of Contents (TOC)