You might see the error qbdbmgrn not Running on this Computer informing you about a problem with your QuickBooks Database Server Manager, which is required to ensure multi-user accessibility in QuickBooks. To repair the qbdbmgrn not running on this computer error, you would only need to restart the QuickBooks Database Server Manager using the Services windows. Also, check firewalls that allow port settings for processes and ensure that QuickBooks has been updated to the latest version. The QuickBooks File Doctor can also be run to solve any problems about the network.