QuickBooks Error 15241 typically occurs when the QuickBooks payroll update did not complete successfully. It may stem from issues related to the QuickBooks Desktop File Copy Service (FCS) not functioning properly. This error can hinder the payroll function and other operations within QuickBooks. To resolve it, ensure that the QuickBooks Desktop File Copy Service is functioning correctly. You may also consider disabling User Account Control (UAC) and running QuickBooks as an administrator to mitigate the issue.