Thank you for that, NotGettingAnyYounger. I've had the quickest of looks and will investigate further when I get a chance. I have to say it's from a company I've never heard of (not that that's too hard!) and I'm not looking to replace any more than Malwarebytes in manual mode, being very happy with Avast and the assorted other stuff which I use. I will be interested to see what support it garners from the PPRuNe think tank!