LES File Type

Written by:   |   Refreshed: November 15, 2018

Microsoft Silver

LES File Summary

There are two file types associated with the LES File Extension, with the most widely-observed being the Lesson File format. According to our database, two distinct software programs (conventionally, Mklesson developed by David A. Wheeler) will enable you to view these files. The majority of LES files are considered Data Files, but they can also be Settings Files.

We have found LES files on the MS-DOS and Windows operating systems. They are both mobile and desktop device friendly. LES files have a "Low" Popularity Rating; this means that they are not present on most devices.

To learn more about LES files and their associated software applications, please see the information below. Plus, we provide a basic troubleshooting guide to solve problems with opening LES files.

Low
Popular
6097
Standing

/ 11690

Obsolete

State

15

November

2018

Revised

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Varieties of LES Files

  2 known file types use this extension

Principal LES Type

.LES
File Name:.les
Group:Lesson File

The file extension LES is generally used in several educational or learning programs for files which have individual lessons. These files are normally in a data format, though in some instances they may be plain text files.

Created by: David A. Wheeler
Division:Data Files
Key: HKEY_CLASSES_ROOT\.les

Software Programs That Open The Lesson File:


Mklesson by David A. Wheeler

MS-DOS

Additional LES Files

.LES
File Name:.les
Group:Logitech Entertainment System Game Profile

The LES file extension is related to Logitech, a company in Switzerland that develops entertainment devices such as speakers, joysticks, and gaming keyboards. The LES file was used to contain a gaming profile configuration.

Created by: Logitech
Division:Settings Files

Software Programs That Open Logitech Entertainment System Game Profile Files:


Unknown Software by Unknown Developer

Compatible with:

Windows

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LES Requests


Top Operating Systems

Windows (82.33%)
Android (11.56%)
iOS (3.43%)
Macintosh (1.71%)
Linux (0.60%)


Sources of LES Problems


Typical LES Opening Challenges

Mklesson is Not Installed

You encounter an error message such as "%%os%% Can't Open LES Files" when trying to open your LES. If this is the case, it's usually due to the fact that you do not have Mklesson for %%os%% installed on your computer. The typical path of opening your LES with a double-click won't work because %%os%% cannot make the program connection.


Tip: Another LES-related program can be selected to open the file by clicking "Show Apps" and finding the application.


Outdated Mklesson

Sometimes your installed version of Mklesson won't support your Lesson File file. Visit the David A. Wheeler website to download (or purchase) the latest version of Mklesson. The primary cause of this problem is that your Lesson File file was created by a different (newer) version of Mklesson than what's installed.


Tip: Right-clicking on your LES, then clicking "Properties" (Windows) or "Get Info" (Mac), can provide clues about your file version.


Regardless, most of the LES file opening problems relate to not having the right version of Mklesson installed.


Other LES File Opening Causes

Even with the correct version of Mklesson installed, you can still experience difficulties opening LESs. If you are still having problems opening LES files, there may be other issues that are preventing you from opening these files. Problems unrelated to software:

  • LES file references in the Windows Registry are broken
  • Deletion of the LES file description from the Registry by mistake
  • Partial installation of Mklesson that did not fully complete
  • The LES itself is corrupted
  • Malware-tainted LES file can't be opened
  • LES-related hardware has device drivers that obsolete
  • Too many applications are open on your PC to load your Lesson File file successfully

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