Stepwise use this guide and fix QuickBooks Error 1920
Sometimes updating or installing QuickBooks Desktop trigger QuickBooks Error 1920 that displays an error message “Error 1920: Service QuickBooks Database Manager (QBCFMonitorService) failed to start”. QBCFMonitorService (QuickBooks Company File Monitoring Service) is required by QuickBooks Database Server Manager to connect the QuickBooks company file with the desktop app.