From Igor Tolmachev:
System Files Lister is a small utility that enumerates files protected by System File Checker mechanism used with the Windows File Protection (WFP) feature. This feature does allow to protect core system files from being accidentally or intentionally modified by third party programs. If System File Checker discovers that a protected file has been overwritten, it retrieves the correct version of the file from the cache folder (%Systemroot%\System32\Dllcache) or the Windows installation source files, and then replaces the incorrect file. System Files Lister tool helps to enumerate all those protected files.