According to Intuit, there are several possible causes for Error Code 1603:
- the QuickBooks installer didn’t detect a version of Adobe Flash 7 or greater installed on your computer
- the QuickBooks installer didn’t detect that the required Microsoft .NET 1.1 SP1 has been installed
- you clicked Abort after receiving another error such as error code 1328
- your copy of the Microsoft Windows installer is corrupt
- your QuickBooks installation is damaged
Because there are several possible causes of Error Code 1603, the solutions vary as well. Based on the additional information that accompanied the Error Code 1603, follow the appropriate link below to resolve it.
For 1603 errors that mention Adobe’s Flash player, consult this Intuit knowledge base article.
To determine the version of Adobe’s Flash player you have installed, you can use Adobe’s Version Test tool.
You can also use Adobe’s Flash Settings Manager to control the operation of your Flash player.
For 1603 errors that mention Microsoft’s .NET framework, consult this Intuit knowledge base article.
For 1603 errors that state that “The update installer has encountered an internal error” or “Unable to Apply Patch”, consult this Intuit knowledge base article.
For 1603 errors that occurred when installing an update, consult this Intuit knowledge base article.