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How to Fix QuickBooks Error Code C=343?
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Natalie Wood
2 posts
Jul 22, 2025
4:02 AM
Are you facing QuickBooks Error C-343 whenever you try to open company files or some specific company file in the QuickBooks program. This error can be caused due to multiple reasons, and a large number of QB users have been suffering from this error lately. Notable reasons include damaged Microsoft components or QuickBooks not being updated to the latest version. The current blog shall delve into the different solutions for fixing QuickBooks Error code C=343 in an elaborate manner.
Solutions that can help troubleshoot QuickBooks Error code C=343

The solutions listed in this section have been tried-and –tested by our experts and these have successfully contributed towards the extermination of this error on most of the sample systems. So, keep reading and perform the solutions one-by-one on your system.

Solution 1: Updating Quick-Books
Since an outdated version of Quick-Books keeps users detached from the advanced features that come along with every new update, updating is a necessary recommendation for all users. Furthermore, updating QuickBooks can also help in resolving an array of different errors, including Quick-Books Error C=343. The procedure is given below:

· The initial step requires users to run QuickBooks as an admin. For this, the Desktop icon of QuickBooks needs to be right-clicked, followed by clicking on the Run as Administrator option.

· Now, when the Quick-Books window is open, the next step is to hit on the Help menu, followed by which the user is required to click on the option to Update QuickBooks Desktop.
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Last Edited by Natalie Wood on Jul 22, 2025 4:38 AM


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