You are not alone if you are unable to utilise QuickBooks due to a problem with the QBDBMgrN (QuickBooks Database Server Manager) service. This problem has been reported by a number of QuickBooks users who are using Windows operating systems to operate their software. “QBDBMGRN not running on this computer” and “QuickBooks Database Server Manager Stopped” are two common user queries on the QB support forums. The Windows firewall is interfering with the QBDBMgrN service and restricting its connection to the internet.