On Windows 8.1, Nero software requires some Windows updates.

1. Please open Control Panel->Windows update, install all Microsoft recommend update, restart machine.

2. Open Control Panel->Windows update-> view Update history, please make sure KB2919355 and KB2999226 has been installed.

3. If KB2919355 is not installed, please go to https://support.microsoft.com/en-us/help/2919355/windows-rt-8-1-windows-8-1-and-windows-server-2012-r2-update-april-201 , download the Windows 8.1 update package for your system and install according to the install instructions in the webpage .  

4. If KB2999226 is not installed, please download it from Microsoft website and install it. For x86 system, https://www.microsoft.com/en-us/download/details.aspx?id=49071 . For x64 system: https://www.microsoft.com/en-us/download/details.aspx?id=49081 .

5. After these KBs are installed, please restart system and install Nero 2019.