Payroll update error 15243 usually occurs when QuickBooks users download the latest released updates. This error code produces a discrepancy in the business process workflow leading to the unwanted Payroll update error 152342. QuickBooks payroll error code 15243 also shows up when some other programs having discrepancies with Q.B. Desktop software are running in the background. Furthermore, this error also occurs when the ’FCS Service’ is disabled. Through this article, you shall come to know about the various factors leading to the error and the various troubleshooting methods for resolving this error in no time. The only prerequisite is that you go through this article till the very end.