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Basic information about NUP file

When there is a problem with opening files with the file extension NUP（*.NUP or *.nup）, you do not need a computer expert. In most cases, using the helpful suggestions of experts contained in our website as well as appropriate programs, you can solve the problem with the NUP file yourself.

There are 1 file types using the NUP file extension in our database. In the further part of this page, you will find detail information about all the NUP file with their brief description and a list of programs that support NUP file sorted by operating systems. The table below provides useful information about the NUP file extension. It answers questions such as:
  • What is the NUP file?
  • How to open a NUP file?
  • What programs do I need to open a NUP file?
  • What programs help to create and edit a NUP file?
  • How to convert NUP files to another file format?
  • How to convert another files to NUP file format?


1.Detail information about NUP file extension: Smart Security Update File

File type Smart Security Update File Category Misc Files
Developer ESET File format Binary
Description NUP file is a Smart Security Update File developed by ESET. A NUP file is an update file used for updating ESET Smart Security, a personal firewall, antispam, antivirus, and antispyware program. It contains the update name, software version and build, category, date, file size, and the update module data. NUP files are also used by other ESET products, including Cybersecurity for Mac.
Software programs that will open, edit or convert NUP files

Windows		 ESET Internet Security
ESET Nod32 Antivirus
ESET Smart Security

macOS		 ESET Cybersecurity for Mac



Can't open a NUP file?

When you click a file to open it, operating system examines the filename extension. If operating system recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When operating system does not recognize a filename extension, you receive the following message:

”Can't open this file: example.NUP”。

To open this file, you install one of the applications from the list of software programs that you found here, you should be able to open, edit or convert the file with the NUP extension without any issue.


Where I can download the application that support NUP file?

If you do not know where you can download the application from our list, click on the link (which is the name of the program), you will find more information there on the location where to download the required application. Most often they are the websites of software manufacturers.


How to change file associations?

  • Right-click a file with the extension whose association you want to change, and then click "Open With".
  • In the "Open With" dialog box, click the program whith which you want the file to open, or click "Browse" to locate the program that you want.
  • Select the ”Always use the selected program to open this kind of file” check box.


Can I change the extension of NUP files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read/open the file. The problem is, changing the file extension does not change the file format. Select a software program from our list and install it on your computer. If the file has not opened correctly, you have to look for a different software program from our list. Sometimes you have to repeat the operation several times.


What else may cause problems width open a NUP file?

The reasons for the lack of the ability to open a NUP file on your computer may be at least several. The easiest thing is to find a suitable application installed on your computer, which will open a NUP file. If there is still something wrong, you might want to check:

  • Whether the NUP file is damaged.
  • Whether the NUP file is incorrectly linked in the registry entries.
  • Whether the NUP file extension has been accidentally removed from the Windows registry.
  • Whether the installation of an application that supports the NUP file format is incompletely.
  • Whether the NUP file is infected.
  • Whether the drivers of the equipment used for opening a NUP file are up to date.
  • Whether your computer has enough hardware resources to open a NUP file.

If the NUP file still not working with your software after eliminating the above shortcomings? That means that the problem is more complex and requires the help of a specialist.