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NU3 file format description

NU3 file format

We made this page to help you understand how to work with NU3 files. Here, you can find info on software that can handle these files. It includes simple programs for opening and converting them.

Learn about the NU3 file and its functions here!

We also explain how to convert them into other types. It's simple and hassle-free. For opening or changing NU3 files, this page offers all the tools you need.

#1 Norton Utilities Backup Data

The NU3 file is categorized under Data. It is associated with Norton Utilities, serving as a Norton Utilities Backup Data. Norton Utilities is a utility software suite designed to help analyze, configure, optimize and maintain a computer. Visit the website of Norton Utilities for a detailed description of the NU3 format.

Application:Norton Utilities
Category:Data files
Mime-type:application/octet-stream
Magic:- / -
Aliases:-

Norton Utilities Backup Data related extensions

  • t16 H&R Block 2016 Tax Return Data
  • hmhd Microsoft Word for Mac Hyphenation Data
  • schd Microsoft Excel Schedule Data
  • obr Objective ECM Reference Document Link

Did someone accidentally misspell the NU3 filename?

The NU3 filename extension may be misspelled. We compiled a list of similar file extensions to help you find errors.

Filename extensions similar to NU3:

Windows can't open your NU3 file?

When you try to open a file by double-clicking it, Windows looks at the file's name to figure out what to do. If Windows doesn't know the file type, it'll ask you to choose an app to open this NU3 file.

To set the NU3 file association in Windows 11, you can follow these steps

  1. Open the Settings app by clicking on the Start menu and selecting the gear icon.
  2. In the Settings app, click on System and then select Apps from the left-hand side menu.
  3. Scroll down and click on the Default apps option.
  4. In the Default apps section, you will find various categories. They include Email, Web browser, and Music player.
  5. Locate the category that matches the file type you want to associate. For example, choose Photos for image files, or Video player for video files.
  6. Click on the current default app listed under the category. A list of available apps will appear.
  7. Choose the app you want to set as the default for that file type. If the app you want is not listed, click on More apps to see more options. Or, click on Look for an app in the Microsoft Store to search for apps.
  8. After selecting the app, it will become the default choice for opening files of that type.

It's worth mentioning that you don't always need to set NU3 file association. Many apps can open files. They don't need a specific file association to be set.

Handle NU3 files with care

Exercise caution when handling NU3 files from unknown sources. Files from certain sources can threaten your computer's security. They might contain malware, viruses, or harmful software. To minimize risks, avoid downloading or opening unfamiliar NU3 files. Use trusted antivirus software to scan files from unknown sources before opening.

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