Trovi and Bing Malware
Thanks to you all for the advice.
After 4 hours of much aggravation the cure was simple, as it always is if you know what the 'recipe' is.
I did everything noted in the replies, to no avail. THEN, it hit me.. I had to alter SAFARI before anything would come back like I had on Safari.
Go to Safari, click EXTENSIONS, remove the aggravating advertising by Trovi, brought to me by Bing. Then Click GENERAL and remove BING and make sure that (for me) the default engine is Google, with Google Chrome as the Default web Browser.
Double check the Homepage you want: Mine is Gmail, so make sure it says what you want,
then press Set to Current Page.
Viola! Everything goes back to normal.
If it hadn't been for the Reply Help I wouldn't have understood what the General and Extensions choices in Safari PREFERENCES was. If it happens again, make sure you change Safari before you change anything else. Thanks again my friends, for your help. Francey