How to Fix QB Error Code 1603

QuickBooks Error 1603

How to Fix QB Error Code 1603

‘Error 1603. The update installer has encountered an internal error’ this is what a dialogue box says when you face QuickBooks Error Code 1603.

QuickBooks is accounting software that offers quick and stable accounting help to small and medium enterprises. It is an accounting essential for all firms that have a lot to manage but their scale doesn’t allow them to hire a personal accountant for all their accounting headaches. So, QB handles all the trauma of payrolls, bad debts, taxes, invoices in one go. But what if, you are a user and habitual to this accounting software and it shows up with an uncommon error like QB Error Code 1603. You should not be stressed out as QuickBooks will always help you out. Either it will offer you a helpline number or a troubleshooting blog like this to help you out.

Causes of QuickBooks Error 1603

These can be the possible reasons for QB Error Code 1603 to occur:

  • Might be your windows components will be missing
  • Incomplete installation of QB software.
  • .net framework must be outdated
  • Destroyed Microsoft C++ components.
  • MSXML component damaged.

How to Resolve QB Error Code 1603?

A user can fix QB Error 1603 in various ways. Generally, the first method works for most users. For those it doesn’t, they can make use of the second method to resolve QuickBooks Error 1603. It is necessary to make use of the solutions step-by-step in order to get the best results.


  1. To resolve QuickBooks Error Code 1603, you can get in touch with a trained professional by assistance your computer’s manufacturer or via a windows expert.
  2. The troubleshooting steps mentioned by us will most likely remove the error from your accounting software
  3. Users may as well contact QuickBooks team if they find it difficult to make use of the steps on their own.
  4. If the error doesn’t go away even after using troubleshooting guidelines, it is best to connect with the certified QuickBooks pro advisors team.

Let’s Do the Troubleshooting

There are 2 ways to Fix QB Error 1603-

1. QuickBooks Install Diagnostics Tool 

This QB tool automatically solves all the technical issues related to .net, C++, and MSMXL. Just install and run the tool and wait for the repair process. Once you are able to fix QuickBooks Error 1603, don’t forget to restart your computer.

You can download the tool by utilizing these steps:

  • Go to a web browser (Google Chrome, Microsoft Edge or Firefox) in your computer system and search for QuickBooks Install Diagnostic Tool.
  • Once you find the installation link for Diagnostic Tool, click on it and save the file on your desktop.
  • Now, double-click on the file ‘QBInstall_Tool_v2.exe’ and click on the ‘Run’ button.
  • Once installed, it will begin a complete scanning process on your computer and repair all the issues.


2. Manual Steps  

Besides using the diagnostics tool you can also for these below mentioned manual steps-

  • Updating Windows to the latest version can also be a solution to this QuickBooks Error 1603.
In Windows 10, 8.1 and 8 

Go to windows icon, move to settings, go to update and security, and click on check for updates.

In Windows 7 

From the start button, go to control panel and chose system and security. Press Windows update, check updates.

  • Repair Microsoft .NET
  • Reinstall the C++ program
  • Redirect MSXML
  • Rename the installed folders
  • Try reinstall the QuickBooks desktop version

If you still are hopeless and need to know more of the troubleshooting or facing any other QuickBooks error like error 1303 rather than QB Error 1603, you can contact us anytime at QuickBooks Support Phone Number +1-800-469-4817.


The above blog talked about QuickBooks Error 1603 that is mainly caused while updating or installing QuickBooks Desktop. In this blog, we discussed the causes of this error, manual steps to overcome the respective error and also, how we can work on the issue with help of QB diagnostics tool. These steps will surely help any QB user who might be facing an issue with his software due to QB Error Code 1603.

Also, read this blog – How to Fix QuickBooks Error 1904


Leave a Reply


We are an independent team of experts and ProAdvisors for QuickBooks. All the logos, brand names, and trademarks used on this website remain the property of their owners and do not suggest any direct connection. The information provided on this site is purely for illustrative purposes. Individuals who visit this website agree to accept all the risks and take full responsibility for any damage or loss that they face.