Error 1719 cropped up in the 2017 version and Intuit has failed to fix the bug, so it is in the 2018 version. Basically, the TurboTax installer does not play nice with the Windows 10 Installer (only app I have that has this problem.) So, until they get around to fixing a year-old plus bug, here is the work around. You will need to do this before installing TurboTax and before each update on Windows 10 workstations.
1. Log off TurboTax
2 . Open task manager (right click on the bottom Windows bar)
3. Go to the "services" tab
4. Under "Description" select "Windows Installer"
5. Right click and select "Go To Details"
6. "msiexec.exe" will be highlighted. Right click and "end task"
7. Now you can install or update
