Hi,
Was having same problem as everybody else and found this advice at the start of this forum, tried it and it appears to work for Excel?
Good luck!
Lee.
Answer

ΜπάμπηςΑβρατόγλου replied on
I have just got rid of the problem.
i've got MS-Excel 64 bit.
I had turned ON the advanced option:
(File/Options -> Advanced -> General ->)
Ignore other applications that use Dynamic Data Exchange (DDE)
I did that to get rid of the
cannot use object linking and embedding
error when starting Excel.
I consequently found that the problem with this error was that something had changed the DCOM User to my account instead of the launching User
(Component services\Computers\Mycomputer\DComConfig\Microsoft Excel Application-> Properties (right click) -> Identity (tab) change this user to the launching user)
When I did that cannot use object linking and embedding was gone, but
There was a Problem sending the command to the program
was shown up each time I tried to double click an Excel file.
Finally I turned
Ignore other applications that use Dynamic Data Exchange (DDE)
back ON
and now everything seems to be fine!
Hope that helps
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