QuickBooks software has reached pinnacle of popularity by benefiting business owner across the globe through enhanced accounting software capable of efficiently completing many accounting tasks within stipulated time period. The software was bifurcated into 3 main software that were further made available in two versions – Desktop and Online. The desktop version is much preferred over Online one as the user is provided with extra features, faster processor speed and better performance of the software. However, as with other versions of software, QuickBooks is also adept in encountering issues which are generally denoted with an error code. One such error faced by some is called QuickBooks Error 1603 which is encountered mostly while updating the QuickBooks desktop or installing it.Enterprise user can get help from QuickBooks Enterprise Technical Support for fixing all issues related to QB installation.

1603 Fatal Error During Installation QuickBooks
Corrupted Microsoft Windows installer file or damaged / incomplete QuickBooks Desktop installation can cause the following error to occur:
“Error 1603: There was a problem installing Microsoft .NET Framework [version]”
Or
“Error 1603: The update installer has encountered an internal error”
Error Messages
When installing an update within QuickBooks Desktop software, user might encounter any of the following error code messages:
“Error 1603: The update installer has encountered an internal error.”
“Error 1603: Unable to apply patch.”
“MSI returned 1603: Fatal error during installation.”
In order to resolve this error of QuickBooks Desktop, Intuit has provided with resolution as per the situation they have occurred in. These resolutions are subject to fact that the Windows Operating System is functioning properly and is not corrupted. It is, furthermore, recommended to follow the solutions in the manner they are displayed for garnering best and fastest way to resolve QuickBooks Error code 1603. .

Error Code 1603

Fig. - View of the Intuit QuickBooks Error Screen when Error Code 1603 occurred

Error 1603 When Installing QuickBooks
Scenario 1: In case user is performing installation function of QuickBooks Desktop Software.
Download, install and run the QuickBooks Install Diagnostic Tool
QuickBooks Install Diagnostic Tool, in most cases, can fix the QuickBooks issues faced while installation of the software, setup or while software updating download. However, at times tool malfunctions with the operating system and ends up causing issues with Windows components that invariably further causes errors with the software. It is advised to follow all the solution in the order they are illustrated to arrive at best possible solution. Moreover, user should try to check whether the issue is resolved after trying every solution to evaluate which category of error has occurred.

1.First go to Intuit official website and locate the QuickBooks Install Diagnostic Tool exe file to download and resole the error without any fuss.
2.Once downloaded and installed, save the required tool on the desktop only.
3.Close all the programs running on the system as well as in the background.
4.Hover mouse over the file and double click it to run the program.
5.Now locate and select the option labeled ‘I am having problems installing QuickBooks’ and then click on ‘OK’ tab.
6.Once the process is complete, reboot the system to ensure all and every change made is correctly updated over the system

Error 1603 When Updating QuickBooks
Scenario 2: In case the user is performing updating function of QuickBooks Desktop Software
User will need to reinstall the software again with a clean install tool while ensuring that the function has been completed using the installer tool instead of the CD option.

Step 1: Completely Uninstall QuickBooks Desktop
a.Open startup menu by clicking on the ‘Start’ icon on the screen or clicking on ‘Windows’ icon located on the keyboard, followed by typing in ‘Run’ in the search field and selecting the option when it gets displayed.
b.In the field provided under Run pop-up window, type ‘Control Panel’ and then select OK option.
c.Select the option ‘Uninstall Program’.
d.From the list of applications, locate and click on QuickBooks followed by selecting the Uninstall/Change option.
e.Finally complete the process by following the prompted instructions displayed on the screen. In case a message pops up depicting error in the completion of Uninstallation of QuickBooks, user will be required to get in touch with either Microsoft officials or connecting with proficient and qualified IT individual as the message is generated due to error faced within the Windows operating system.

Step 2: Rename of Installation folders
User can allow QuickBooks clean install tool to automatically rename the folders of installation process or can do so manually in case the tool is not being employed.
➔ Download, install and run the QuickBooks Clean Install Tool
➔ Manually rename the installation folders of QuickBooks Desktop software.
➔ An Error might be encountered stating – “Access Denied when renaming folders”

Step 3: Reinstall QuickBooks Desktop
Once the folders are successfully renamed the last step is to reinstall the QuickBooks Desktop software by downloading and installing it from secured link.

Get Help Technical Support for Troubleshotting 1603 Error
In the scenario, wherein the Intuit QB Error 1603 still persists even after completing the two mentioned resolution tips, it is advised to get in touch with QuickBooks Support having professional IT knowledge as well. They are adept in handling such errors and will guarantee provide users with feasible solution. The above steps mentioned above can help to fix 1603 Error on Windows 7, Windows 8, Windows 8.1 and Windows 10 also user can apply for QuickBooks Pro, Premier, enterprise 2013, 2014, 2015, 2016, 2017, 2018 edition.