Thanks for that, and I even took a deep breath and clicked the link, half-expecting Avast to block it.
But it didn't, and I read some of the stuff about preventing malware getting into a computer.
The most potent method,
AFAIK, is never, ever to click on unknown links, especially when they are totally unidentifiable and look as suspicious as this one does. But Google doesn't say that.
I have just confessed to doing exactly that. What an idiot I am.