I have a user that needs to save excel files to WK4 format. When she
tries to do so she gets the following error:

Run-time error: '1004'

You are attempting to save a file type that is blocked by your
registry policy setting.

Any idea how I can help her? I hope we will not have to update the
registry. That is beyond the capability of the user and it is further
complicated in that she is in a different location so I cannot see her
screen.