Please provide your computer's MAC address (aka physical address). This is needed to generate the license key required to activate the software. Please ensure this is correct to ensure proper functionality.
On a Windows machine
Go to Start->Run and type in cmd. (In Windows 10 you can type "cmd" in the "Search the web and Windows" box)
In the black screen (command prompt window) that pops up, type ipconfig /all.
Your computer should then list a bunch of information, including "Physical Address: ..... 00-xx-xx-xx-xx-xx". This is your MAC address.
View article on How to Find Your MAC Address