TurboTax FAQ
TurboTax FAQ

Error 8191: Setup failure

Error 8191 occurs when installing .NET:

Setup Failure—unknown reason.

Follow these steps:

  1. On the Windows taskbar, select Start, then Control Panel, and then Add or Remove Programs.
  2. Select TurboTax, and then click Remove.
  3. Select .NET, and then click Remove.
    Note: If a higher version of .NET is installed (e.g. .NET 3.5), uninstall the higher version first, and then the lower version.
  4. Install TurboTax. (TurboTax will prompt you to install .NET.)
  5. Update TurboTax.