To resolve this error, access the Windows Services Manager and restart QBCFMonitorService. Ensure that copyright is updated to the latest version, and check your firewall settings to allow copyright processes. These steps will restore the service and resolve multi-user access problems. https://medium.com/@bizbooksadvice/qbcfmonitorservice-not-running-on-this-computer-heres-how-to-fix-it-091ee22e24ce