Back online. Lost track of this post due to the telephone line going down (not my fault) and being on the road almost every other day. The desktop seems to be okay now unless the gremlins are hiding away somewhere - I think I'm in the clear. Many thanks for your help.
I may reappear again and again (apologies) because I use the Internet A LOT and however careful I am, a full evening of surfing can catch you out. I do wish the repeated
Safe Search plugins I plug in would stick, they seem to switch themselves on and off when they feel like it, or evaporate without trace :-o
But thanks again & to all!
AV