The QuickBooks C=343 error occurs when you fail to access the QuickBooks Company file. this could result in QuickBooks Desktop not being updated periodically. With this article, we will enlighten you on completely different causes and ways of resolving QuickBooks C=343 efficiently.


Corrupted MsXML Services File (.dll) File- Browser programs or extensions need DLL files as these files include program code, data, and resources.

Not to exploit the new unharness of QuickBooks- you may want to confirm a new version and as a result, unharness per click is possible F2 to request Windows Window data.

Unsubscribed Files- you may want to re-register the files if QB is not working so you will be able to start QuickBooks again to check if the issue has been submitted. As long as the issue is not resolved, you will be able to transfer and install again Microsoft’s Core XML resources.

Fix QuickBooks C=343 Error: Solution

There are 3 square measurements to fix the QuickBooks C=343 error. It is quite accessible that the main solution itself solves the problem; however, if it does not solve the problem, you will be able to go to the opposite solution.

1- Update QuickBooks Desktop

  • First, update QuickBooks to the new unharness.
  • Next, open QuickBooks again


MSXML.DII square files of third-party operation files may be merged with QuickBooks.

32-bit system

  • First, open the ‘Start’ command window
  • Go to the search field and enter Regsvr32 MSXML.dll
  • Click OK
  • In the meantime you will receive a message indicating ‘Successful Registered Status’ that is, you will now see the instant language ‘Success’ on screen
  • Now Restart QuickBooks

64-bit system

  • First, Open Windows Windows Command
  • Now within the search space, fill in the text ‘cmd’ to open an electronic connection window.
  • Press ‘Enter’ from the keyboard
  • Now fill in the command CD-Windows-syswow64 and press OK
  • Fill out ‘Regsvr thirty-two MSXML3.dll’ and click the Apply button from the keyboard.
  • Fill out ‘Regsvr thirty-two of MSXML4.dll’ and click on the Enter button again on the keyboard.
  • Both ‘.dll.’ Include a square measure of currently registered success.
  • Now restart QuickBooks Application

3- Extract & Reinstall MSCML.dll Files

  • First, open the transfer page and rummage around files
  • Next transfer these files to the system
  • Install these files into the system, currently double-click the MSXML file.MSI, and execute the on-screen extended commands.
  • Restart QuickBooks

4- pass QB Install testing tool

  • First, submit the QuickBooks Install Diagnostic Tool
  • Now save the file to the traditional Desktop, whenever you are told.
  • Next, Launch QuickBooks Install Tool and close any open programs
  • Depending on the speed of the net and the performance of the laptop, it will take about twenty minutes to complete.
  • Once you have used the tool, make sure that the elements of the square measure properly

5- Use QuickBooks in safe mode

  • Holding the ‘Ctrl’ button, double-click on the QuickBooks icon
  • QuickBooks can open in safe mode with multiple company files.
  • Click on file
  • Now select an open file and scan the text.
  • When QuickBooks Opens, however, the new company file is not a gap then try and verify and build in:
    1. First, select a file
    2. Go to file functionality
    3. Then make sure to build.

6- QuickBooks Clean Install Tool

Now, look at trying and doing a clean installation. make sure you get a backup copy of the info file (which ends in .qbw) in a secure location for example on a flash drive or in another folder. currently performs QuickBooks Clean installation to fix QuickBooks C=343 error.

In addition, the solutions should resolve the issue and get you released on QuickBooks Error C=343. Each decision is completely different and aims to fix things by amending the problematic space. However, if you can’t open the error with any of the above solutions, then seek professional help from the QuickBooks Support team at +1-844-929-2244.


Live Support