The QuickBooks error code 343 is a very common error that can happen from time to time. This error is usually caused by the QuickBooks program not being able to connect with the QuickBooks network servers, which in turn prevents users from accessing their information on-demand. This error typically happens when the computer is not connected to the internet correctly or when it has been shut off for a period of time without turning back on before connecting back to the network. An error is a fault or failure of the software to run or perform a particular task on different operating systems causing difficulties for the user to utilize the software. QuickBooks error C 343 is one such error that obstructs users from using QuickBooks Desktop applications on Windows. The error appears when the user tries to run QuickBooks and throws an error message "Unexpected Error: An error has occurred in QuickBooks C = 343.” The error message suggests users restart QuickBooks that doesn’t always help resolve the error.
QuickBooks Desktop error C 343 falls under the category of C = XXX series of errors where error C = 343 is caused by several reasons listed below:
An outdated or discontinued version of QuickBooks Desktop application.
An older version of the Windows operating system also causes QuickBooks Desktop Error C 343.
Damaged or corrupt QuickBooks Desktop Company file.
The program cannot run because an unexpected condition was encountered. Contact your service provider."
Here are Some Solutions to Fix QuickBooks Error Code C = 343
Solution 1: Install the Latest Version of QuickBooks Desktop Application
For detailed instructions on installing the latest version of QuickBooks Desktop application follow our article How to Update QuickBooks Desktop to the Latest Released Version.
Solution 2: Disable Windows Compatibility Mode for QuickBooks Icon
Exit QuickBooks Desktop application on Windows and right-click the QuickBooks icon.
Select Properties and then navigate to the Compatibility section.
Uncheck the Run this program in compatibility mode for checkbox and select OK.
If the box is already unchecked, then choose Cancel and follow the next troubleshooting step.
Solution 3: Disable Windows Compatibility Mode for QuickBooks QBW32.exe file
Navigate to the QuickBooks installation folder to locate the QBW32.exe file.
You will find the file inside C:\ Program Files (x86)”—usually C:\ Program Files (x86)\ Intuit\ QuickBooks folder.
Locate and right-click the QBW32.exe file and then select Properties.
Under the Compatibility section, make sure Run this program in compatibility mode for checkbox is unchecked.
If not, then uncheck the checkbox and select OK.
Try to run QuickBooks once again, and if you are still getting QuickBooks error C 343 then follow the next troubleshooting step to repair the damaged QuickBooks Desktop Company file.
Solution 4: Repair Damaged QuickBooks Company File
QuickBooks File Doctor is a tool developed by Intuit® that automatically repairs the damaged QuickBooks company file and network. For detailed instructions on downloading and installing QuickBooks File Doctor follow our article How to Fix Damaged Company File or Network using QuickBooks File Doctor.
Solution 5: Install a Supported Version of Windows Operating System
For detailed instructions on installing a version of Windows that support QuickBooks Desktop follow the article How to Install a Windows Operating System. The latest version of QuickBooks Desktop requires Windows Vista (SP 2), Windows 7, 8, 10 32-bit and 64-bit versions installed.
Users have reported instances where even after following all the troubleshooting steps error C343 reappears in QuickBooks if this is the case and you are still facing the same error, then we suggest you get in touch with us at our QuickBooks Customer Service Number 1-855-742-7868 for immediate help and assistance.
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