I found it Margie. Go here: http://esupport.sony.com/US/perl/swu-download.pl?mdl=BDPS570&upd_id=6268&os_id=27 sounds like way more work than I want to do. I'll check my version as they recommend and keep my fingers crossed that I don't need it.
When I receive an update, my screen tells me to go to my Sony home sceen, which I do on the blue ray player. It also says after that to go to networks, which I do. On my player 770W the updates are always there and they install with no problems. I just pray there is no power failure during the updates as that will toast your blue ray player. I am sure you don't have to go to your computer and to the sony website for the updates. If your blueray is connected to the internet via ethernet or wireless, you should have no problem getting the updates directly from your blueray player. Good luck and hope this helps.