For those following this topic, due to posting limits I had to post updates here Tracking thread for Norton 25.9 / 25.10 / 25.11 / 25.12 releases - #42 by user10572
In short, the actual focus grab problem seems to have been fixed or isn’t noticeable, but there’s still something strange happening with high cpu unless Norton is open on the desktop, on all of the PCs on which I have Norton installed.
Now that my post cap has been increased, I’ll put any further updates in line on this topic.