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Unleash the procedure to troubleshoot QuickBooks Error 4120

One of the premier accounting software, QuickBooks is used by small and medium sized businesses for their basic to advanced accounting needs. Offering a great variety of tools, QuickBooks helps organizations in preparing invoices, bills, payments, managing payroll and many other things. All these features make QuickBooks the most sought after. But it is prone to bugs and errors which may disturb the process and ultimately the workflow. One needs to be aware and alert when the error occurs, so that they can resolved without any data loss.

QuickBooks Error 4120 is one such error which displays a message-

‘QuickBooks has encountered a problem and needs to be shut down for any further explanation’.

You may also like: How to Fix QuickBooks Error Code 6150?

What Causes QuickBooks Error Code 4120?

There are a series of reasons that can cause this error:

  • If any software change has occurred to QuickBooks, then the windows register has been corrupted.
  • When the QuickBooks executable file or other components are maked as unsafe by any anti-virus or security software.
  • When virus on your system harms the files that are related to Windows. This also poses a threat to QuickBooks related files.
  • When the files of QuickBooks are deleted by some program by mistake.
  • When QuickBooks is incompletely installed or there is some defective or corrupt download.

Effects of QuickBooks Error 4120

When QuickBooks Error 4120 occurs, the software works slowly and responds slowly to the action, i.e. to the mouse and keyboard inputs. The computer may also be crashed due to the occurrence of Error code 4120. Your computer may also freeze or hand for few minutes at some times.

How to Resolve QuickBooks Error Code 4120?

There are some steps that can help you resolve this error.

Solution 1: Check for any System Errors

  • Update the antivirus and the antimalware programs on your system.
  • Do a full scan of your system once the program is activated
  • Now, eliminate the virus and fix the bugs
  • If you find that no virus is causing this error, then try other solutions.

See Also: How to Fix QuickBooks Error Code 6147, 0?

Solution 2: Try using QuickBooks File Doctor Tool

Solution 3: Copy Company Files to Another System

  • First of all, copy all the company related files to some other system. Now, check if you can open the files in another system or not.
  • If the file opens, then repair the windows of the previous system
  • If the files do not open in the other system as well, that means that the files are damaged. These damaged files can be repaired by using QuickBooks File Doctor Tool.

Read Also: How to Fix QuickBooks Error Code 6150, -1006?

Solution 4: Reinstall or Repair QuickBooks

  • Go to “Control Panel” and then “Uninstall QuickBooks
  • Try to repair the software now.
  • If there is an error, reinstall QuickBooks.

Also try manually to these steps as well:

  • Clear the junk of your system
  • Repair the registry entries
  • Using Windows System Restore, undo the recent changes

You may also like: How to Fix QuickBooks Error Code 6144 82?


If you are not able to resolve the error using any of the above solutions, then contact our QuickBooks error support team at our toll-free .i.e. +1-844-405-0907. Our experts stay alert 24*7 and are highly experience to resolve your errors in the least possible time.


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