September 21, 2021

What Does QuickBooks Error 1603 Mean and How to Resolve it?

Quickbooks error 1603

Quickbooks error 1603

Heard a lot about QuickBooks Desktop and want to use it to manage day-to-day accounting activities, but each time you try to install it on the computer, QuickBooks error 1603 unexpectedly pops up on the screen? If yes, make sure to read this post until the end to know why such an installation error arises and how you can get over it quickly. You might be getting an error message with the error prompt reading, “The update installer has encountered an internal error.” With this post, we aim to provide you with all the information required to fix error 1603 that too in layman’s language and step-wise manner.

Are you looking for instant troubleshooting assistance to get rid of QuickBooks error 1603? If yes, feel free to speak to our professional technical team at the toll-free number (844-888-4666).

What can be the reasons behind the occurrence of QuickBooks error code 1603?

Down below, we have mentioned all the reasons that can trigger QuickBooks error code 1603:

  • Any corrupted QuickBooks Desktop installation file.
  • Outdated Windows operating system.
  • Unregistered Microsoft MSXML DLL files on the computer.

What are the best troubleshooting solutions to fix QuickBooks error 1603?

Solution 1) Run the QuickBooks Install Diagnostic tool from QuickBooks Tool Hub

  • Get QuickBooks Tool Hub of the latest version ( from Intuit’s website and save it on the Windows Desktop.
  • Select the installer QuickBooksToolHub.exe stored on the desktop and follow the instructions mentioned on the screen.
  • Finish the installation of QuickBooks Tool Hub by agreeing to the terms and conditions.
  • Double-select the icon of QuickBooks Tool Hub to open the application.
  • At the left pane of the window, select the Installation Issues tab.
  • Click on the QuickBooks Install Diagnostic Tool button and let the tool run.
  • When the tool finishes repairing the installation files, try to install QuickBooks Desktop on the computer.

Solution 2) Update Windows to the latest release

  • On the keyboard, press the Windows key to select the Start button.
  • Into the search box, type “Settings” and select Settings from the search results.
  • Look for the Update & Security option in the settings and double-select it.
  • From the left pane of the window, select the Windows Update tab.
  • Click on the Check for updates button to download and install the most recent Windows updates.

Solution 3) Manually register the Microsoft MSXML DLL files on the computer

  • On the keyboard, press the Windows key to select the Start menu.
  • Type “CMD” into the search box and select Command Prompt from the search results.
  • In the command prompt window, type “regsvr32 MSXML6.dll” and then press the Enter key on the keyboard.
  • Try to install QuickBooks Desktop on the computer.


If QuickBooks error 1603 persists even after implementing all the troubleshooting solutions mentioned above in the post, then any security applications installed on the computer might be preventing the installation of QuickBooks Desktop. Therefore, our recommendation for you is to use the Windows selective startup mode to install QuickBooks Desktop and see whether this fixes the error or not. For additional troubleshooting assistance to fix the installation error, feel free to get in touch with our QuickBooks professionals at the toll-free number (844-888-4666).

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