Re-register file types with a Microsoft Office program

When you are not able to open a Microsoft Office document even though it is associated with the correct file type, you must re-register the file type with the appropriate Microsoft Office program, such as Excel, Word, or PowerPoint.

About this task

In these steps, program.exe is a placeholder for the executable file for the Microsoft Office program that you want to re-register. If you installed Microsoft Office to another location, use the path that is correct for that location.
Note: If you are using the command line on version 7 of Microsoft Windows operating system, you must elevate the rights of the command line to perform certain tasks, such as re-registering file types. To open an elevated command prompt, or a command prompt in Administrator mode, right-click the command prompt shortcut, and select Run as Administrator.

Procedure

  1. From the Start menu, click Run.
  2. To disassociate the program version, in the Open box, type the following command, and then click OK:

    program.exe/regserver

  3. To specify the default version, from the Start menu, click Run.
  4. In the Open box, type the following command, and then click OK:

    program.exe/regserver