Question : Excel Macro Enable Prompt Not Prompting

I have many users accessing the same file.  There is a select group of users located in another building about 40 miles away that experience times when they open the file that the file does NOT prompt them to Enable or Disable macros and the file opens with macros Disabled automatically.  Sometimes, however, the file opens and the prompt does indeed come up.

I verified the security setting to be at Medium, and indeed, there are macros within the file.

This file has been used by all other groups without this occurring.  However, this remote group experiences this situation more often than not.

Any ideas why this may be happening and how to make sure the prompt always comes up?

Answer : Excel Macro Enable Prompt Not Prompting

You can gain some time by using BeginUpdate()/EndUpdate():
http://msdn.microsoft.com/en-us/library/system.windows.forms.treeview.beginupdate.aspx