After removing previous installations of ChemOffice 17, and downloading the installation file, follow the instructions below to install ChemDraw Pro.
Before the installer wizard starts, you will be asked to activate your software. Enter your name, 'Lehigh University', the email with which you registered with Perkin Elmer, and the Registration Code from your email. If you don't receive an email, check the software information page for the key for the version you've installed.
Once the wizard has finished, you can start the program by clicking on the 'Start' button, and typing 'ChemDraw Professional'.