File Extension Library


.DUP File Extension

  • Developer by: Microsoft Corporation
  • Category: Settings, options, themes or skins Files

What is an .DUP file?

.DUP file extension is created by Microsoft Corporation. .DUP has been classified as Settings, options, themes or skins Files.

.DUP is Microsoft Windows DUA Polling Reconfiguration data

The dup file extension is associated with the Microsoft Windows, an operating system for desktop computers, tablets and smart phones.

The dup file stores settings for Microsoft Windows DUA (Device Update Agent) service.


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 .dup 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 Open .DUP file on different platforms

Open .DUP File on Windows

  • Right-click a .DUP
  • Left-click "Open With" > "Choose another app"
  • Select the program that opens .DUP file and Select check box "Always use this app to open .DUP files" Press "Ok"

Open .DUP File on Mac

  • Right-click (or Ctrl + Left-click) the .DUP file
  • Click "Open With" > "Other.."
  • Then choose another program from the app list and press "Open"
  • Select check box "Turn on" for "Always open in app"

Open .DUP File on Linux

Right click on the .DUP file, choose "Open with" and select a program from the list above

Open .DUP File on iPhone

Select a file. If you don't see an application to open the .DUP file, tap "Share" and choose the right app.
Method 2
Save the file. Then open the app «Files». Touch and hold the file, then release your finger. You will see a black menu bar. After that tap "Share" and select an application.

Open .DUP File on Android

Tap the Settings icon on an Android smartphone, then select «Applications». Click the Settings icon in the upper right corner of the screen, to change the default apps.
If you want to open, edit, save or even convert .DUP files on Android, then your best bet is to download one of the dedicated apps available on Google Play.

How to fix problems with .DUP files

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