IISLogs v4.0 is will ONLY handle .ZIP, .LOG, .BAD, .BDP, .BDR, .TXT, .BAK, .DAT, .XML file extensions, by default. All other extensions are ignored and reported why they were not processed in the detail log file. The Per Directory feature processes the same extensions in IISLogs Classic along with EXE, DLL, INI, CFG and "unknown extensions". One exception if the unknown extensions option is selected in the Per Directory feature. Even though the unknown extensions option is configured, it will not process protected system file extensions.