To be honest, I suspect the damage has already been done since the BBC has the story. You don't have to do what I suggest below, but it may protect the recorder from getting a WORSE UPDATE --
If you want to bypass that update so you can maybe use the DVD disconnect the Aerial plug. Then go into your Sony menu and try to disable Software updates temporarily.
Now, if you have a fairly new TV set that uses what we call HDMI CEC (aka Sony Smartlink) we might be able to link the TVs Guide to the recorder and let it use that....
Anyways, the information is VAGUE, even for me....but it's there.
Older Sony instruction books use to have listings of the menu in pictures...but now it's a vague acknowledgement of its existence. Anyways, the point is we need maybe a week for Sony to fix it, so we do want to temporarily turn off any Software updates, then in a week turn it back on.
As long as you do that, you can watch TV channels without it updating. ONCE YOU TURN IT OFF....then you can PLUG YOUR AERIAL BACK INTO THE UNIT.
And at the BOTTOM of that picture I sent...there seems to be the CAPABILITY of downloading the GUIDE FROM THE TV SET, not using the guide from your recorder !
BUT...to do that...you need an HDMI cable between the two units that's HDMI 1.3A, and the TV set does have to have HDMI CEC ( Sony Smartlink, Samsung Anynet, Panasonic VieraLink, Sharp AquosLink) .
I think HDMI CEC control (one remote controls ALL devices - you press the recorder's power button, the TV turns itself on and switches to the correct input to watch your recorder, That's HDMI CEC) would have to be turned on in both the TV and the Recorder, then that setting in the picture would need to be verified/activated, THEN you might get the GUIDE without any of the Software Downloads that BBC mentioned.
As long as the unit hasn't already updated, Sony has the ability to disable software updates and rewrite a new one.
If you HAVE been affected....then Sony has to write a NEWER VERSION to override the defective version.
The KEY...you don't want your recorder locking up and not even responding when you press the power button.
I think you're OK right now. I think you have full access to operations. I think the only thing I'm concerned about is just turning off any Automatic updating temporarily, and setting it to Manual updating for about a week.