How to open MST file extension?

The author of advice: Mr Brankiewicz

MST files are incessantly popular. However, a file name containing MST file extension is problematic for some of the users. They have problems with correct opening of a file with MST extension. However, it should be remembered that MST file extension can match one or more types of files. The most popular is Windows Installer Transform Script Format but if there are others, you will find information concerning them below.

So, it is worth looking close at the problem concerning MST files and search for its solution.

A list of programs supporting files types with MST extension can be found below. Applications are sorted according to appropriate operational systems and their popularity.

  • Windows Installer Transform Script Format

    .mst file extension

    Category: Executables

    OS Software
    Windows Windows Installer (for the associated software program) Windows Installer (for the associated software program)
  • Corel Presentations Master Template Format

    .mst file extension

    Category: Configuration Files

    OS Software
    Windows Corel WordPerfect Office X5 Corel WordPerfect Office X5

How to check if a file we want to open is not infected by malware or viruses?

  • Download Malware/viruses removal tool from MST files in the Windows system.
  • Click “Start scanning” and wait until the programme performs the scanning process on your computer.

What are the reasons of errors concerning MST extension of files?

The problem that often causes damage concerning MST extension are Windows system registry errors. That is why, in the first place it is recommended to:

  • Scan computer in order to identify, repair and open the MST file
  • Check system registry from the angle of hidden errors
  • Repair file’s associations with programs in the system registry

If you are not sure if the above problems concern you, you should consider other frequent irregularities:

  • You do not have an appropriate application installed that supports MST file extension
  • MST file is corrupted
  • The application’s version necessary to open the file is not correct
  • The file is not assigned to an appropriate program

Solving problems with MST files


If MST file does not open, firstly, it is worth using files associations built in the Windows system with application that can support them. In order to do it, you should double-click a MST file icon. A list of programs that probably support such a file will appear. It is enough to choose one of them so that Windows would open a given extension with it. Incorrect file’s association will result in Windows trying to open MST file with a wrong program all the time even if there is an appropriate application supporting this format on a drive. In this case, it is necessary to perform the above mentioned registry scanning and associations’ repair.

If associations are correct and Windows still cannot open the file, most probably the computer does not have appropriate software supporting files with name containing MST in their extension. The solution to this problem is very simple. You should buy or download a free (if they exist) application that will allow you to open, browse and edit MST format (You can also try to find more informations on FileInfo). It is no risk because many paid programs have free test versions enabling to check their functionality.

Do you have extra information about a MST file? [ Add information about a MST file ]

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