While logged into your Windows workstation in which QuickBooks is installed, you receive the error:
IntuitSyncManager.exe - entry point not found
This error has been known to generate when there are multiple copies of QuickBooks open.
The program should now open without the error message.
If these solutions don't resolve the issue, you can read discussions and post messages and questions relating to your issue on the Intuit QuickBooks Community site for free. You can contact an agent for additional guidance. Fees may apply.