TeamVIEWER icon showed up on laptop this morning - my regular Mac desktop screen missing, figured out it TV was appearing under Guest User. Then I made error of downloading installer thinking my son was wanting to help me clean up my lap top from afar because I am 80 and get very confused and had asked him for help because I don't understand the tech vocabulary. Anyway, I can't get rid of it. It had someone's PW (hidden) an ID and could be 'remote controlled'. I saw a yellow caution sign appear so I stopped trying to install. but now I get a TEAM VIEWER Package that won't delete or go away. This is very scary to a senior because EVERYONE is warning us don't click on unknowns. No one has used my laptop. I live alone. It appeared by itself this morning. And it had a Safari icon but I use only Firefox. Thank you.