This agreement was initiated for you by whom ever installed the programs on your computer before you received it. It may be prudent to determine if the software that comes with your computer was installed from legal copies. Reputable dealers will see that you are provided the original disks and documentation including the licensing agreement. Copies that are also passed to you by friends or through network bulletin boards or other means are not legal copies, save a few that may be free-ware, public domain, or the like. Public domain does not include Share-ware, which is a marketing decision.
Most licensing agreements allow a copy of the program to be made for backup purposes.
This allows the master disks to be retained in a safe place in case the disk you are using is damaged, lost, or corrupted by a virus. It has been my sad experience to find that many of the students taking my computer ethics course have a great deal of illegal software on their computers. When I inquire where they got started in this illegal practice, most answer that they first brought their illegal copies from home. These are copies made of the programs from the family computer. Very often the student has been assisted by a parent in making these illegal copies.