After migrating from a Win 7 to a new Win 10 machine via Laplink, we seem to have a couple of issues:

(1) "The file exists."  When opening our company file, it prompts "the file specified cannot be opened.  Make sure that it is not currently being used by another program or a read-only file."  We keep clicking OK for 30 or 40 times, and eventually reach a prompt for HELP or CANCEL.  It tells us that FCS Service is damaged (Error 15243).  We cancel at this prompt, and then the company file is loaded and continues to work OK.

(2) We checked for the Error 15243, but we do not see it anywhere on your support pages.  We updated the whole payroll, and hopefully resolved this issue.  We have not closed our company file after this update, so we do not yet know.  Anyway, what is the Error 15243?