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QBCFmonitorservice not running on this computer ssue occurs in multi-user mode where QBCFmonitorservice crashes and The most common symptom of this Error is Unable to open company file or cannot switch into multi-user mode. Thus we have shared a full-fledged article on How to fix QBCFmonitorservice not running error If you have any doubt or concerns then you must Dial our Helpline number 800-579-9430.