English to Greek Tech/Engineering Computers (general)

Context:
After verifying your registration name and *registration code* and downloading the activation code from our server, XXX will congratulate you on successful activation. That’s all. You have activated your copy of XXX...
Please note there's a difference between the *registration code* and the activation code. The *registration code* together with the Hardware ID is needed to obtain the activation code. XXX is activated only when the activation code is entered. Until then it behaves as an unregistered version.
See: http://www.ablebits.com/excel-find-replace-manager-addins/on...