Yes, parados (a few posts above) suggested the option of turning the cheery voice off ...
Soon, I think.
And you're right about my problems with Firefox, Tico.
I managed to download & "save" it, but couldn't find any Firefox "run" options.
Perhaps someone with more expertise in these things would have known what to do next, but I didn't. (still don't, actually)
Anyway, I'm now very pleased to have free antivirus protection up & running, for the first time ever. (hooray!
Thank you so much for your help.
And to everyone else who posted information, too.