File Extension Library

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.CU_ File Extension

  • Developer by: Microsoft Corporation
  • Category: Archive and compressed Files

What are .CU_ files and how to open them?

Can't open .CU_ file? Are you wondering what it contains? On our site we will explain to you what this file is, what it is used for and what software opens the .CU_ file.

What is a .CU_ file extension?

.CU_ file extension is created by Microsoft Corporation. .CU_ has been classified as Archive and compressed Files.

.CU_ is Microsoft Windows Winhelp compressed file

The CU_ file extension was used in some previous version of Microsoft Windows for one of the compressed files utilized by WinHelp.

Microsoft WinHelp is a proprietary format for online help files that can be displayed by the Microsoft Help browser.


How to open:

This file type is not meant to be opened directly, there is no software that could open and work with it directly, or there is no information available in public sources about opening this file type. This is usually the case of some internal data files, caches, temporary files etc.

How to convert:

As far as we know, this .cu_ file type can't be converted to any other file format. This is usually the case of system, configuration, temporary, or data files containing data exclusive to only one software and used for its own purposes. Also some proprietary or closed file formats cannot be converted to more common file types in order to protect the intellectual property of the developer, which is for example the case of some DRM-protected multimedia files.

How to fix problems with .CU_ files

  1. You need to update the application that you normally use to open .CU_ files. Only the latest version of the software supports the current .CU_ file format
  2. You need to check the .CU_ file for viruses. To do this, you need to scan it with a popular antivirus (Norton, Nod32, Kaspersky, Dr.Web, etc.)
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