Polonus, I really am very, very grateful for the time that you have taken to contribute to this thread and for your attempted explanation quoted below. I am sure that the vast majority of computerists will follow this with ease but in my case, it just goes to illustrate how computer illiterate I am.

It must be clear to anyone who has read my posts, that I am way out of my depth here and for that reason will now sit back and go over the thread time and time again until I gain a little more understanding. Thanks to those who contributed.

Edit: Clicked opn that ‘Potentially Dangerous’ pic but only got the same thing shown against a white background. Am not sure what the message is here, if indeed, there is a message.