The QuickBooks File Copy Service (FCS) plays a vital role in payroll and tax updates. If this service is disabled, users encounter QuickBooks Error 15241. This error blocks updates and restricts payroll operations. To fix it, users need to manually restart or enable the FCS from the Windows Services Manager. Without this service, payroll updates will fail repeatedly. Ensuring FCS remains active and QuickBooks runs with administrative privileges helps maintain smooth functionality of payroll features without disruption.