If you are having issues installing Lotus 123 on to your Windows 10 computer ... try this work around:
How to use the CD to install to workaround the error.
1. From the Windows taskbar, choose Computer --> find the SmartSuite icon in the CD/DVD drive.
2. Right-click the SmartSuite icon and choose Explore, or open in new window, to display the files included on the SmartSuite CD.
3. Navigate to setup.exe, right-click setup.exe --> choose Run As Administrator.
4. Double click on setup.exe
The install should begin without error.