Best way to fix QuickBooks Error Message C343
                     Best Troubleshooting Ways 
for QuickBooks Error 
Message C343
QuickBooks Error C 343 indicates difficulty accessing the company file in QuickBooks, often 
caused by outdated software versions. This impedes users from essential tasks, requiring 
meticulous troubleshooting steps for resolution. Resolving error C 343 may pose challenges 
for some users due to its complexity.
In this blog, we delve into the justifications behind confronting 
QuickBooks Error Message C343 and deliver thorough answers to address it effectively. 
Our objective is to help users in overcoming this error and confirming seamless functionality 
within QuickBooks.
Struggling with QuickBooks error code C 343? Don't worry! For quick and dependable 
solutions, get in touch with our knowledgeable customer service team at our Toll-Free 
Number 1.855.856.0042. We are available to offer you individualized support based on 
your requirements, so you can quickly resume using QuickBooks without any 
problems!

Reasons Responsible To Start QuickBooks Error 
Code C 343
The two most typical explanations for the occurrence of QuickBooks error code C 
343 include the following.
• Any damage or corruption in the QB company file can lead to company file error C 343. As 
the company file is essential for the adequate functioning of the QuickBooks Desktop, any 
issue within this file can prevent the user from working seamlessly on this file.
• The QuickBooks error code C 343 may occur due to missing, damaged, or corrupted 
Microsoft core XML services.dll files. When these essential files are not functioning 
correctly or are absent, QuickBooks encounters difficulties accessing the necessary 
components, resulting in the error message C 343.
Approaches To Fix QuickBooks Desktop Error C 343
Use these two approaches on your system to eliminate the QuickBooks desktop error 
C-343 efficiently.
Solution 1: Registering the MSXML.DLL Files on your System.
The MSXML.DLL is not directly related to Intuit products but can be integrated with 
QuickBooks Desktop to resolve related issues.
Steps for 32-bit systems:
• Open the Run command window by searching for it.
• Enter 'Regsvr32 MSXML.dll' in the search bar and click OK.
• Upon successful registration, a message will appear indicating 'DllRegisterServer in C:
[Windows Folder]\system32\MSXML[Number].dll succeeded.‘
• Restart your system after receiving the success message.
Steps for 64-bit systems:
• Open the Run Command Window and enter 'cmd' in the search area, then hit Enter.
• You will see a Command Prompt window on the screen now.
• To proceed, input 'CD-Windows-syswow64' and click OK.
• Then, execute the commands 'Regsvr32 MSXML3.dll' and 'Regsvr32 MSXML4.dll.‘
• Restart your QuickBooks application after registering both files.
Solution 2: Utilize Safe Mode in QuickBooks
Begin by pressing the Ctrl key.
Then initiate the Start Mode in QuickBooks with multiple company files by clicking twice on the 
QB icon .
If the new company file doesn't open, run the Verify and Rebuild Data Tool.
Navigate to 'File Operations' and select 'Verify Rebuild' to execute the tool.
If QuickBooks Error Message C343 persists after attempting manual solutions like re-
registering files and rebooting, consider reinstalling Microsoft's XML services and updating your 
Windows OS. Please don't hesitate to get in touch with our QuickBooks professionals on our Toll-
Free Number 1.855.856.0042 for quick support if the problem continues. We are available to 
assist in resolving any outstanding problems and guarantee the seamless functioning of your 
QuickBooks program.