QuickBooks Error Code 30159 typically occurs due to issues with payroll setup or data corruption, causing disruptions in processing payroll. This error might be triggered by an outdated Windows operating system, incorrect file setup, or issues with the payroll subscription status. To resolve the issue, you can update your system, verify your payroll subscription, or contact QuickBooks Payroll Support at 1.855.738.2784 for expert assistance in troubleshooting the error efficiently.