What is QuickBooks Error Code 4120? How do I fix it?

I have been using QuickBooks from many years now and never faced any problem in the recent past. Today I was entering the bank transactions manually to my check register and I got Unrecoverable error xxxx 4120 and the whole QuickBooks got crashed, it is been happening from many days and today it happened multiple times. I tried to search How to fix QuickBooks Error Code 4120 on Google and got multiple results, but nothing helped me to fix this error. I am very frustrated now as I have to finish up the daily accounting tasks and this error is driving me crazy. I have purchased QuickBooks pro 2019 recently and excepted to run it smoothly. I cannot complain the computer as well, as it is fairly new.

I hope somebody will be able to help me to fix QuickBooks Error Code 4120.

1 Answer(s)

Hi William,

I would like to first tell you the causes or reasons for QuickBooks Error Code 4120 , for a detailed guide to how you can fix this error, you can see this article. As this is a critical error and could be serious and requires an immediate attention:

  • Important files or components related to QuickBooks is deleted or blocked by the Security software installed on computer.
  • The Windows Registry related to QuickBooks gone corrupted and need to be repaired by the expert Windows Technician who also has the knowledge of QuickBooks.
  • Incomplete installation of QuickBooks file or missing file related to QuickBooks.
  • Windows components like .Net Framework, MSXML, and C++ are having issue or the version installed on your computer is not compatible with QuickBooks installed on computer.


I am sure you will be able to fix the issue related to QuickBooks Error Code 4120, and if you have any difficulty you can contact a QuickBooks Certified ProAdvisor on 1-877-263-2742.

Answered on May 14, 2019.

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