When installing QuickBooks Desktop or a product update, one of the following error occurs:
Error 1601: Windows Installer is not accessible
Error 1603: There was a problem installing Microsoft .NET Framework [version]
Error 1642: Error installing Microsoft .NET Framework when installing QuickBooks
Error 1603: The update installer has encountered an internal error
This error can be caused by a damaged Microsoft Windows Installer or a damaged QuickBooks Desktop installation.
To resolve the error, try one of the following solutions.
If you get the error while installing QuickBooks: Repair or reinstall Microsoft .NET Framework.
IMPORTANT: If you are not comfortable doing these steps on your own or if the error persists, contact your IT professional or Microsoft support.SLN41462