Fix Disabled File Copy Service in QuickBooks Desktop

The QuickBooks File Copy Service (FCS) is one of the most important background services used by QuickBooks Desktop during payroll updates and software maintenance. Although it runs silently in the background, this service is responsible for copying and replacing essential program files whenever QuickBooks installs payroll updates or maintenance releases. If the service becomes disabled, QuickBooks may be unable to complete these tasks, leading to repeated update failures and interrupted payroll processing.