How to Fix Sign-In Problems and Recover Your Intuit Account To resolve this, you need to create an exclusion for QB programs in your antivirus software. If this doesn’t work, you can try performing a disk cleanup on your server system and other workstations to eliminate the problem. Once you’ve done this, restart your computer and open the QB application to see if the QBCFMonitorservice error message has been resolved. Another common reason for this error is due to an antivirus application installed on your system that blocks QB programs from executing properly.