QuickBooks Error 4120

When QuickBooks Error 4120 arises, it can be really distressing, as your system will start running slow and frequently crashes down. The QuickBooks Error 4120 usually occurs with an error message, stating QuickBooks required imitate shut down due to some issue in the application.

Why do you get QuickBooks Error 4120?

There are myriad of reasons why Error 4120 takes place, some of which are listed below:

  • Security-software or antivirus program is incorrectly marked.
  • Corrupt Windows registry due to alteration in the software linked with QuickBooks.
  • Another program has accidentally deleted QuickBooks related files
  • Corrupt or unfinished QuickBooks download & installation.
  • Virus or malware causing files destruction.

QuickBooks Error Code 102

How To Resolve QuickBooks Error 4120

When your system experiences QuickBooks Error 4120, it might fail to react quickly to mouse and keyboard input. Your system might frequently crashes down, hangs or freezes for few seconds, and prevent you from proceeding with your work

You can go through the steps below and perform them to resolve your error. For any assistance required kindly contact AccountingErrors Support Service.

1. Solution One: Resolve System Errors

  • Update antivirus programs running on your system.
  • Once the updates complete, activate the program, and lunch full scan of the system.
  • Check for any bugs, malware, and viruses, and then remove them.
  • If you don’t find any virus and still get the error, perform the next solution

2. Solution Two: Use the QB File Doctor Tool

  • First, have the QB File Doctor tool downloaded and installed in your system.
  • Once the process completes, run the installed program. This tool will diagnose the issue in your system and mechanically fix the error.

QuickBooks Error Code 1016

3. Solution Three: Transfer Company Files to another System

  • Copy all company files and save them on a different system. After this, check out if you are able to open the files on the new system.
  • If the files open without any issue then it means that the first system where you have installed QuickBooks has been corrupted. Hence you need to repair Windows on that particular system.
  • If the files still don’t open in the new system, it means the files have been corrupted. You can employ QB File Doctor Tool and fix your error.

4. Solution Four: Repair or Reinstall QuickBooks

  • Open to Control Panel and click on Uninstall option.
  • If provided with an option to repair QuickBooks Support, attempt the steps in order to repair your application.
  • If the repair option doesn’t resolve your error, then you should proceed with QuickBooks un-installation process and then reinstall it again.

QuickBooks Error Code -6190

How can AccountingErrors Support Service help you?

The above solution steps should help you fix Error 4120. However, if you are unable to fix your problem then allow AccountingErrors Support Service to help you. We have a fine team of professionals who are knowledgeable and skilled in resolving QuickBooks related errors.  They can graciously assist you in fixing your problem. Simply give us a call on 📞 live chat with us via Live Chat Support QuickBooks.


  1. What are the causes of the QuickBooks error code 4120?

    If your security software or anti-virus has mistakenly marked any QB executable file or any other parts as unsafe. Another reason is wrong or corrupted window registries or when another program deletes files that are related to the QuickBooks either by error issue or mistaken. Corrupted or damaged installation QuickBooks files might be lead to this error. Sometimes, it appears due to a virus or malware on your system that affects the files which are related to the window system might pose a warning to the QuickBooks related files.

  2. What are the effects of the QuickBooks error code 4120?

    This error usually happens when the user tries to install the latest version of QuickBooks but fails to complete the process. The system might be run in a slack manner and then respond slowly to all input commands. Sometimes, your window might freeze for a few seconds or this QuickBooks error 4120 appears on your screen repeatedly until you resolve it.

  3. What is the best way to resolve the QuickBooks error 4120?

    The best way to resolve this error is to uninstall and then reinstall the QuickBooks or repair the QuickBooks. To do this, first uninstall the QuickBooks. Then, you have to go to the Control Panel and choose the uninstall option from the available preferences. After this, you have to choose QuickBooks and implement the suitable troubleshooting steps to repair it when it gives the option. If you are still unable to find this issue, then reinstall the QuickBooks but make sure the most upgraded version. Once your installation process is completed, then open your QuickBooks to check whether the issue is resolved or not.

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