QuickBooks Error Code 4120


What QuickBooks Error Code 4120 Means

Although QuickBooks is a premier accounting solution that helps business manage finances and accounts with easy bookkeeping, various issues tend to arise at some point. One such error is the QuickBooks Error 4120.

QuickBooks Error 4120 occurs with an error message displayed on the screen, stating that an issue in QuickBooks has been encountered and required imitate shut down without further explanation.

QuickBooks Error Code 4120

What causes QuickBooks Error 4120 to occur?

There are several reasons why this error takes place, some of which include:

  • An antivirus or a security-software has been incorrectly marked.
  • Change in the software related to QuickBooks can corrupt the windows registry.
  • Another program deletes QuickBooks related files either accidentally or otherwise.
  • Corrupt or defective download or unfinished QuickBooks installation can also cause this error.
  • Virus or malware on the system, harming the Windows system related files.

What happens when QuickBooks Error 4120 occurs?

When QuickBooks Error 4120 occurs, the computer starts to run in a slack manner and react slowly to the input of mouse and keyboard. The system might also get crashed frequently with QuickBooks Error 4120 message displayed on the screen. Moreover, the system hangs or freezes for a few seconds randomly.

How can I fix QuickBooks Error 4120?

The following resolution steps can be implemented in order to fix this error:

Solution 1: Check for any System Errors

  • Update the antimalware and antivirus programs on the system
  • When the program is activated, carry out a full scan of your system
  • Repair the bugs and remove the malware and virus, if any
  • If there are no viruses and the error persists, attempt other solution

Solution 2: Employ QB File Doctor Tool

  • First, download the QuickBooks File Doctor tool and then install the application tool in your system
  • Next, run the program. The program will diagnose the issue and automatically fix the error.

Solution 3: Copy Company Related Files to a different System

  • Copy all company related files to a different system and test if these files are able to open in the system
  • If you are able to open the files, then we advised you to repair the Windows on the system where you have initially installed QuickBooks
  • If you are not able to open the files even in the new system, then the files are probably damaged. Use the QB File Doctor Tool to repair the issue.

Solution 4: Repair or Reinstall QuickBooks

  • Go to Control Panel and click on Uninstall button to uninstall QuickBooks
  • Try to repair your QuickBooks, when provided with the option
  • If the error continues to pop up, then you need to uninstall QuickBooks and reinstall it

Some Other Solutions

  • Clean out files trash and junk from the system
  • Repair registry entries that are related to the error
  • Use the Windows System Restore in order to undo the changes made recently in the system


If you are still not able to resolve the issue with the above resolution steps, kindly give us a call on +1-800-993-4190. We have an excellent support team of QuickBooks professionals. They will in a most efficient manner help you resolve QuickBooks Error 4120 and other issues. You can also get our support via Live Chat Support or by sending a mail at customer@businessaccountings.com.

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