QuickBooks Desktop

“QuickBooks Error 1603: The update installer has encountered an internal error”

Is your computer screen flashing similar error message at the time of QuickBooks installation? Well, it is a common problem QuickBooks users face. Trusted by millions of small and medium business owners across the globe, QuickBooks is one of the most popular accounting software.

QuickBooks error 1603

At times, QuickBooks installation can be a quirky thing. The QuickBooks error 1603 can occur at the time of installing QuickBooks. It can happen because of some error in the Windows system files or a damaged QuickBooks Desktop Installation. If you are facing the same problem and looking for some fixes then go through the steps here.

How to resolve QuickBooks Error 1603?

The problem mainly happens because of some error in the Microsoft .NET Framework. Along with that, some error in the installation file can also be the reason. Therefore, repairing Microsoft .NET Framework and the damaged installation file will fix the QuickBooks Error 1603. Try the troubleshooting steps one by one and check whether the problem gets resolved or not. You can check out our other posts like enable flash in Chrome and more. 

Run Windows Update

An outdated Windows operating system is the basic reason behind the damaged system files. Therefore, before proceeding with any advanced steps let’s try the most basic one to fix QuickBooks error 1603.

  • Firstly, hit the Windows key on your keyboard
  • Then search for Windows Update
  • Open Windows Update from the search results
  • Click on the check for updates button
  • Now wait until the process gets completed
  • Finally, when the updating process gets completed check whether your QuickBooks error gets fixed or not.

Run Windows Update

Still facing the problem? Then you must go through these advanced steps.

Repair or Reinstall the Microsoft .NET Framework

You can repair Microsoft .NET Framework simply by running the QuickBooks Install Diagnostic tool or you can choose to reinstall it manually. Here we have mentioned steps for both of these. You can choose as per your convenience.

QuickBooks installation freezes

Download and install QuickBooks Network Diagnostic Tool

  • Firstly visit the official QuickBooks website and locate the diagnostic tool.
  • Or, you can click here to get the file directly.
  • Next, save the file to your computer
  • Now, close all the other program running on your PC
  • Then, run the diagnostic tool. Navigate to the local disk drive and double click on QuickBooksDesktopInstallDiagnosticTool.exe to run the file.
  • Wait until the process gets completed. Depending on your network connection’s speed and performance of your PC the process can take up to 20 minutes.
  • Finally, when the diagnostic gets completed restart your computer to proceed with the updates.

QuickBooks Diagnostic Tool

Repair .NET Framework manually

As we have said earlier you can update the .NET Framework manually here we are with the required steps.

  • Firstly, Open the control panel form your computer
  • Now, click on Uninstall a program
  • Then, select the button ‘Turn Windows features on or off’.
  • Here, you will have to verify whether the .NET Framework 4.5 or 4.7 is enabled or not.
    • Have a look at the box beside .NET Framework. If the box is not checked, click into the box to enable the service. 
    • Select ‘OK’ and then reboot your computer to proceed with the changes.
    • If you find that the .NET Framework is enabled then you need to repair it.
    • Clear the box and reboot your computer. After that, you will have to re-enable the Framework and reboot your computer again.
  • After enabling the .NET Framework 4.5 or 4.7 you will have to do the same with the Microsoft .NET Framework SP1

Still facing the problem? Then you must have to reinstall the QuickBooks Desktop Application using a clean install.

Reinstall using a clean install

Reinstalling the QuickBooks Desktop using the clean install will surely fix your problem. The process of reinstallation includes four steps. Follow one by one to reinstall QuickBooks on your computer.

Step 1: Uninstall QuickBooks

  • At first, open control panel.
  • Now, select Programs and Features
  • Then, locate QuickBooks from the list programs installed
  • Right-click on QuickBooks. And then, select Uninstall/Change
  • After that, follow the on-screen instructions to complete the uninstallation process

Quickbooks error 1603

Step 2: Download & Run QuickBooks Clean Install Tool

  • Download the QuickBooks Clean Install Tool.exe file on your computer
  • Locate the QuickBooks_Clean_Install_Utility.exe file in the disk drive and double-click on it to open
  • Then, go through the license agreement and Select I Accept button
  • Choose the version of QuickBooks Desktop app you want to install and select continue
  • Select the OK button when you get the message, “QuickBooks is now ready for a clean install”

QuickBooks Clean Install Tool

Step 3: Rename QuickBooks installation folders

  • At first, find the hidden files using the Windows Explorer
  • Now, rename every folder locations listed
  • Folder Location:
  • C:\ProgramData\Intuit\QuickBooks (year)
  • C:\Users\(current user)\AppData\Local\Intuit\QuickBooks (year)
  • C:\Program Files\Intuit\QuickBooks(year)
  • 64-bit version C:\Program Files (x86)\Intuit\QuickBooks (year)

Rename QuickBooks installation folders

Step 4: Download and install QuickBooks Desktop

  • At first, you will have to install download  the proper installation file for QuickBooks
  • Now locate the installation file on your disk drive double click to start with the process
  • Click yes button
  • Then select next and go through the License Agreement and click next again
  • Now, you need to enter your license and product numbers and click next
  • Then, select the type of installation
  • After that, choose your system for using the software. There are three options.
  • Select your installation location
  • Now click on the Install button
  • Finally, after the completion of the installation, activate QuickBooks


Anyway, Folks! That’s all from our side. After reinstalling the QuickBooks Desktop you will not face the QuickBooks error 1603 again. If you have any other issues you can ask us for help through the comment box below.

Contact Quickbooks Support if this guide didn’t help you.

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