QuickBooks is amazing accounting software, but at the same time it is prone to certain errors. One such error that we are going to talk about today is the QuickBooks error code 15243. This error is related to the QuickBooks FCS, which is the file copy service not working properly. Such an error is seen when the user tries to install any particular program. It also gets notified about the update patches that are not integrated into the software due to some issues. If you are trying to download the latest payroll update or if you are trying to update the QuickBooks software, then you might face this issue.