Did you find or received DUN file and your computer failed to open it? Below we will explain what is DUN file extension and how you can open it.

What is a DUN file ext?

DUN is a file extension associated with Dunce files.

How to open a DUN file?

In most cases your computer should know what software program should be used to open different file types and extensions like DUN. When you double click on the DUN file format, it should open with appropriate software program. If you downloaded or received DUN files for the first time and your system failed to open it then try free file viewers available on the internet after doing enough research not to fall prey to malware.

How to fix errors with DUN files

Scan the file
Before trying to open DUN files on your Windows make sure that it is safe to do so by running through antivirus scanner.
Update
Unable to open DUN files with the associated software program or see an error than try updating the associated software
Do not
If none of the applications in your Windows were able to open DUN file do not change file extension because by changing file extension you are corrupting the file. In case you already changed the extension you can revert it back to DUN by renaming the file. Incorrect associations are the cause of many DUN file errors.

Finally, if Windows is unable to open file extension DUN you may have registry related errors or may not have the appropriate program installed. We strongly recommend that you run a registry scan.

You are currently viewing the detail page for DUN file ext. This page contains a detailed description of the DUN file type, software tools to help resolve file association errors in the Windows registry together with relevant system utility applications and other related information.