Dekstop app background update ... any suggestions

Dear friends
I have been using owncloud for a long time, I’ve got a linux server with several clients: Windows, Linux and Mascox.
I would like to ask you an opinion on how to update the client in Windows systems without showing any message to the user who is using the PC.
I know about “administrative privileges” are required to update, but my users aren’t administrators in their Windows systems.
So is there any program that I can run in batch mode to update owncloud client ?
Thanks a lot
Best Regards
Willy