When cleaning Nero software with third party tools (e.g. IObit Uninstaller, Total Cleaner, Revo Uninstaller, etc.), such tools delete Nero program folders and files, but may still keep some Nero traces in Registry key. This would result in installation failure.
For such case, to successfully install Nero again, you have to clean up all remaining Nero entries from your system first. Please follow up the steps in below link: https://nerosupport.freshdesk.com/en/support/solutions/articles/44000918833-how-can-i-remove-all-traces-of-previous-nero-programs-