QuickBooks error code C = 343 may appear due to a Windows compatibility issue. The user finds the message on their desktop
"There was an error in QuickBooks. Please restart QuickBooks and try again. If this error persists, note the C = value and contact technical support. C = 343"
There are several methods that can be implemented to fix the QuickBooks error code C = 343.
Method 1: Use QuickBooks in Safe Mode
Method 2: Uninstall and reinstall the MSXML.dll file
Method 3: Install diagnostic tools using QuickBooks
Method 4: Update QuickBooks to the latest version
Continue reading the blog for solutions that include steps to quickly resolve the issue.