Does Zeus trojan affect Mac?

Thanks so much, we will give this a try. Unless you call Morgan Stanley shady, and some people might , we haven't been on any new or questionable websites. That's what is so puzzling!!

Open your System Preferences and then in the General Preference Pane make sure that "Close Windows when quitting an App" is checked. This will allow you to restart safari without older sessions opening.

It looks like that did the trick. Thanks for the help!!

But why did Apple Support recommend me to install MalwareBytes Antivirus, if you (pinkstones) tell me it is bad to have an anti-virus?