The QBCFMonitorService Not Running On Your Computer error can interrupt multi-user mode and stop QuickBooks from accessing company files. To fix it, open Services.msc and restart the QBCFMonitorService manually. Also, verify firewall permissions and update QuickBooks Desktop to the latest version. Many QuickBooks users fixed the QBCFMonitorService Not Running On Your Computer issue by scanning network files with QuickBooks File Doctor. If the error continues, contact QuickBooks experts at +1(866)409-5111 for professional assistance and fast troubleshooting support.