I tried setting up a file on the network for shared access. When I open it,
I get the error:

"File is locked. In order to save changes to the file, etc. etc."

The file does not show as [Read-Only] when opened. And I have rights to the
file.

If I copy the same file to my personal hard drive (and share it), it's fine.
It is something to do with the configuration of our LAN?