These troubleshooting steps may help resolve your issue of QuickBooks Error C=343. They focus on your desktop Windows installation, which is an Intuit product to check on our website. If you are Intuit comfortable doing these Error steps, you can find expert by consulting your computer's manufacturer or a Windows expert to customer to see on our portal. If the difficulty persists after performing these steps, contact your computer's manufacturer.

Confirm you’re running the latest release of QuickBooks Error C=343.  To verify your QuickBooks release, from within QuickBooks Error press to display the Product Information window.  The Product shows both your version and release in the upper left corner of QuickBooks.

The first troubleshooting step is to register both of these files while QuickBooks is running and then re-start QuickBooks to see if the problem has been resolved for all customers.  If the QuickBooks error Support Phone Number recurs, you’ll need to download and re-install Microsoft’s Core XML services from our site.Those steps would not be the first things to try, but you’ve done the primary, so now we’re reaching a little further afield to try to solve it.

Follow the instructions to rectify error “C=343” while opening QuickBooks:

·          The Open the ‘Run’ window:

·          In ‘Microsoft Windows Vista’, Click on Start, and Go to ‘Run’.

·          In ‘Microsoft Windows XP’, click on ‘Start’, and go to ‘Run’, and then type ‘Regsvr32 MSXML4.dll’

·          Click ‘OK’.

·          Try to open ‘QuickBooks Error C=343’.

·          If the issue still persists from our website.


·          Download and install Microsoft Core XML Services from any QuickBooks website.