QBCFMonitorService is a QuickBooks company file. Sometimes it gives an error that shows when the QBCFMonitorService.exe file not responding. There are multiple reasons for the QBCFMonitorService not running on this computer problem. To deal with this problem, restart the service through the Services menu in Windows, and Make sure your QuickBooks Database Server Manager is updated. Also, you can check your firewall settings to allow QuickBooks connections. We are one of the fastest-growing QuickBooks accounting and QB errors Service providers. To get better results for solving these monitor service errors, you must set up QB Database Manager Service to run the system smoothly.