Hi Eddy,
The new bathroom is now finished and I have cleared up hence the delay.
I’m sure you are correct in every respect.

I have had troubles with Avast Pro since day 1, I should have tried first but was over confident from some years ago.
I have now resolved my issues by switching to ‘manual updates’.
I don’t actually know the cause/causes.
I have posted a couple of things on the forum, raised a ticket etc but, after all, I am on Vista so do not expect too much.
For all I know it may be IPv6/IPv4 & Terodo.
Avast is the 2nd AV with this issue and I know this from my tests with the first.
I’m fine for now
Thanks for your support
David