Can't Start Programs from Microsoft ToolbarID: Q109425 
  | 
In any of the Microsoft Office programs listed at the beginning of this article, you may not be able to use the buttons on the Microsoft toolbar to start or switch to other Microsoft programs if those programs have been renamed.
If you want to use the Microsoft toolbar, use either of the following
workarounds:
Method 1: Do not rename any Microsoft executable files.
Method 2: Make sure the file name is listed in the Path statement of your
          Autoexec.bat file.
NOTE: Microsoft does not support the renaming of executable files. Thus,
problems that you encounter as a result of renaming an executable file will
not be supported by Microsoft Product Support Services (PSS).
In the Microsoft Office programs listed at the beginning of this article, you can use the Microsoft toolbar to start or switch to other Microsoft programs. To view and use the Microsoft toolbar, do the following:
Program                        Executable name
----------------------------------------------
Microsoft Word for Windows     Winword.exe
Microsoft PowerPoint           Powerpnt.exe
Microsoft Access               Msaccess.exe
Microsoft FoxPro for Windows   Foxprow.exe
Microsoft Project              Winproj.exe
Microsoft Schedule+            Schdplus.exe
Microsoft Mail                 Msmail.exe If the renamed executable file is already running, choosing its button on the Microsoft toolbar may launch a second instance of the program instead of switching to the currently running instance.Cannot run '<Program Name>'. The program or one of its components is damaged or missing.
   Condition                  Result
   ---------------------------------------------------------------
   Winword6.exe not running   The above error message is displayed
   Winword6.exe running       A second instance of Winword6.exe is started 
   Condition                  Result
   ---------------------------------------------------------------
   Msmail30.exe not running   The above error message is displayed
   Msmail30.exe running       Switches to Microsoft Mail (since Microsoft
                              Mail only supports one instance of itself) Additional query words: 5.0 7.0 97 launch filename application
Keywords          : 
Version           : WINDOWS:2.0,4.0,4.2,4.3,5.0,6.0,7.0
Platform          : WINDOWS 
Issue type        : 
Last Reviewed: May 7, 1999