We are using ArtistScope Technology to protect the document. And following are the steps to register additional computer in order to open the book.
Step1: Download Artis Browser (It works only in this browser): Click Here
Step2: Open url https://copysafe.net/drm : Click Here
Step3: Go to “My Account Details“
Step4: Go to “Manage Machines”
Step5: Click submit button
And you are done