Well, I downloaded the free trial of eset instead of scanning online! It took 9 hours or more and found no malware but lots of other stuff (which the scanner could not open). Anyway, after realizing that I should have done the scan online, I did the online scan 5 hours and far less files scanned, but it found 9 problems!
I enclose the result of the scan, I'm well impressed that it found these 9 bits of malware.
I can't thank you enough for all your help and 'tuition' with this problem of mine. I'm 72 and love messing about with the technical side of PCs. It was a bit daunting at first but I really enjoyed it. Thanks.