After downloading and installing the Windows applications each require a "Serial Number" (AKA "Licence Key") to be entered to unlock the software so that it can be used.
When you purchase a downloadable Windows application from www.drivingtestsuccess.com the "Serial Number" code(s) you require are emailed to you - please do check your "spam" or "junk" folder if you can't find the email and then get in touch quoting your name, the email address you placed the order through and the date on which you placed your order.