Thank you for alerting us about the error message you're getting, @DDethlef.
Let ensure you'll be able to reinstall your QuickBooks Desktop Pro 2019.
To start with, you need to successfully uninstall QuickBooks from your computer through the Programs and Features from the Control Panel.
Here's how:
- Open the Windows Start menu. Search for “Control Panel”, then open Control Panel.
- Select Programs and Features or Uninstall a Program.
- From the list of installed programs, select the version of QuickBooks Desktop you're having problems with.
- Click Uninstall/Change and then Remove.
- Tap Next. If you don’t see this option, sign out and sign back into Windows as an admin (or a user with admin rights).
Once completed, you're now ready to reinstall QuickBooks. For your guide, check out the instructions from this link: Install QuickBooks Desktop.
If the error continues, you can follow the steps detailed from this article on how to fix errors when installing QuickBooks.
Let me know if you have any other questions. I'm always here to help. Keep safe always!