Error 1603: "A fatal error occurred during installation or updating"
Error 1603: A fatal error occurred during installation or updating occurs in TurboTax for Windows 2008 and later versions.
This error can occur when the Microsoft .NET Framework Installer cannot install and/or update your system. Possible causes include:
- Damaged Windows file and folder permissions
- Damaged Windows Registry key permissions
- Damaged Microsoft .NET Framework installation