Note: This issue is made obsolete by Digital Rights Management improvements in Adobe Digital Editions 1.5 or later. The information provided here is for users who may still be using Adobe Digital Editions 1.0. Adobe recommends that all users update to Digital Editions 1.5 or later.
Digital Editions 1.5 or later users who wish to move epubs from one machine to another should follow the information in the "Transferring Items Between Computers" section of the Digital Editions 1.5 (or later) Help.
In Digital Editions 1.0, you can only open or read eBooks using Adobe Digital Editions on the computer from which you purchased the eBooks.