I think that the only option is to use the auto update, unless real networks posts up their patches on the net to be downloaded.

On my computer, realplayer barely works, most of the time it produces all kinds of errors and windows shuts it down. it uses a lot of cpu, and leaves behind an entry which checks for updates all the time, which that too uses a lot of memory. Use a start up manager, or msconfig to disable the auto update from starting.