If you have Nero trial version installed on computer:
There is no need to go over installation again, you can add original Nero serial number to Nero ControlCenter to activate it to an original version.
If you have no Nero Application (e.g. Nero 2019 Platinum) or incorrectly installed on computer:
Please first make sure that you have uninstalled previous version of Nero Core and Nero Application (e.g. Nero 2019) from Windows Control Panel and then reboot PC.
Then please download and save the latest Nero Software Insallation (e.g. Nero Platinum Suite 2019) to your hard drive.
Please enter your serial number to install and activate it to an original version.