I’m back, I called 1-800-MYAPPLE about this problem, and the guy walked me through a very simple cure - he had me go to Settings (in Safari) on my laptop, go to Notifications, and there is a list of sites I could delete or keep. I deleted some. He had m check the time-date in the upper right hand corner of my laptop screen (I THINK that was it) and it pulled up the Settings icon with no red mark in it again. He says the problem is solved. So far, it works - I am so relieved! I could not get into OPERA, it would have been a huge task to transfer my bookmarks to OPERA. The guy said it doesn’t matter WHAT browser I use, that they would ALL get ”infected” with the same stuff.