• This failure is a bug of ThumbnailCity.
• On Version 1, it will be fixed in Version 1.3.11. On Version 2, it had been fixed in Version 2.1.3.

The causes and action are as follows.

• In case of the registry is overwritten by other software
  • Typical such a softwares are Icaros and K-Lite codec pack, etc. This problem occurs when you install/uninstall these software or change their settings.
  • In case of this, “Thumbnail function” of “System settings” for the relevant extension is turned off. “System settings” can be start from start menu.
  • You can recover by changing the “Thumbnail function” that is OFF in “System Settings” to ON.
• In case of the function is suppressed by antivirus software(security software)
  • In this case, some kind of warning is often displayed by the antivirus software.
  • In this case, refer here.

• To the extent that it has been confirmed so far, this failure is due to a defect in the other middleware.
• The following have been confirmed as the middlewares which has a corresponding defect.
  • Media Preview(BabelSoft)
  • Logitech Webcam Software(Logitech)
  • Icaros(Xanashi)
  • MainConcept MP4 Demultiplexer Direct Show Filter(MainConcept GmbH)