Open CAT files

  • Full name
    Microsoft Security Catalog Format
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Have you encountered a problem with a CAT file? Don’t you know which program opens a file with this extension? You will find all the information you need about working with a CAT file here. In the further part of this page we have added a list of programs that should open your CAT file. It is enough you choose a proper application for your operating system, download and install it.

Programs which can open a CAT file

How to open file with CAT extension?

In order to open a file with CAT extension one of the following programs must be installed on user’s system. If a problem with opening CAT file occurred, it is highly possible that none of the listed programs is present on user’s system. Even if one or more said programs are installed, there may be issues related with given programs. In order to solve a problem with CAT files, follow the instructions below.
Install Microsoft Windows or other program from the list

Most often resolving problems with opening CAT files is very simple. Just install an appropriate program that supports such files. All of the listed programs support CAT files, but may vary in offered function and purpose. Some programs may be capable only of viewing contents of CAT files or offer file conversion options, but may not be capable of editing such files.

Set Microsoft Windows as the default program for opening CAT files

It is possible that although a compatible program has been installed on user’s system, it is not used by the system to open it. This may happen because no default application was associated with this type of files. To associate CAT files with given application, select "Open with" from drop-down menu (accessed by right-clicking on the file). Then select from the list the program or application you want to be used to open this type of file. If the Microsoft Windows applications is not on the list, select "Browse" option in order to manually locate the directory where Microsoft Windows has been installed.


Check the section that lists most common problems with CAT files

Sometimes problems with opening CAT files may not lie with the application itself, but can arise due to other causes, such as:

  • File data is corrupted
  • CAT files has been not been completely download from the internet (only a part of the data has been downloaded)
  • Currently used user account hasn’t been granted necessary privileges to open CAT files (should that be the case, please contact your system administrator or IT specialist)
  • CAT file was being copied from a corrupted storage device and is incomplete or data is corrupted. (Copying files from unknown or untrusted sources should be conducted with great care as such files may contain malicious software, which can damage your system)

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