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What is the .LES File Extension?

.LES File Extension Description:

The file extension .les is associated with the Logitech Entertainment System game profiles, which are defined as system game profiles those functions similarly to a REG file used by the Microsoft Window registry. Personal Computer games that fall under the genre of First Person Shooter (FPS), Golf types, and role playing, are usually designed to use basic input devices (keyboard and mouse) that are definitely present in every computer system to function as game controllers. This type of game controller is acceptable but lacks the functionality of delivering to the player the type of experience that can be achieved by using gamepads or joysticks.

In this context, many game developers endorse various types of game controllers to allow the users to maximize the gaming potential. However, there are some games, which do not automatically recognize the presence of game controllers, and here is where the functionality of the .les file extension comes in. As a game profile, the file extension .les helps to enable the functionality of the game controller specific to the game being played, and not on the type of controller used.

Similar to how a registry key is added by an application to instruct the operating system on how to allow the program to behave; the file extension .les sends commands to the game software on how actions generated by the game controller must be treated. The file extension .les is specific for Logitech manufactured game controllers, which initialize the different buttons, found on the device that can be used by the player, and establishes the level of support for the hardware during game time.

A program called Mklesson, which generates HTML files using single input files that are commonly used for tutorial purposes, also uses the file extension .les. The .les file extension acts as a lesson file for the application, which is loaded by the application, and contains specific lessons to be tackled. There is a particular format to be followed by the .les file extension contents, which is an extended form of HTML that is read by the application, and changed to standard HTML for the user.

A .les file extension lesson begins with the Header, which contains the Tutor Name, Lesson Number, Author Name and Author Address. The Section Name follows the Header, and then by the tutorial questions with Choice Answers and an input field to record the user's Response. The generator will assume that the file extension .les defines two sections, and it will create a file with the name lessonXX, where XX corresponds to the lesson number defined in the Header section. It then appends the .les file extension. Since the file extension .les is converted to a standard HTML document, it can be easily opened and executed by any web browser.

Author: David A. Wheeler, Logitech Gaming Team
Author URL:
Related Applications: Lovelace, Mklesson, Logitech Profiler
Common Path: User Defined


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The Cause for .LES files Errors:

.LES files errors are possibly serious Windows registry errors and may be brought on due to a damaged registry entry that should be rectified at once to protect against even further failure in other applications and/or hardware. During the time the errors continue your system remains capable of possible blue screen errors, device failure and fatal crashes.

.LES files Errors - Common Symptoms:

.LES files error symptoms include application crashes, shut down or start up problems, slow computer performance, sluggish behaviour, input freeze, internal speaker beeps, problems loading application files as well as problems during program installs.

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