thks for yr detailed anwer...
I'm still with Versioln 7.0, Build SVP4KDTV15_EU-user 7.0 NRD91N.S34 5433-release-keys
The "About.." tells me i'm uptodate and nothing to be downloaded !!! so I don't see where to update firmware...
but yes, I've tried all reommended tips by Sony
Seems you are not. You can update to 5.457 as it seems (manually anyway, with USB stick).
What tv do you have? What model do you have? 43X8301C or 43X8309C? (should be the same, only a different region)
Also check the total firmware link in my big post.