I use a MacBook Pro 2013 running 10.12.
About a month ago I opened a link on an email that I believed was a FlashPlayer update from Adobe. When I examined the sent from address it was from "adobes systems.com" (with a double s).
My Mac has started to behave strangely over the past 3-4 weeks, initially It wouldn't send or receive emails (then they started to drip through slowly), this is still occurring.
Now I find that I can't change my default search engine in Safari, I use Bing but now it says Bing in the preferences but goes to Yahoo and won't let me change it. If I go to say "google.co.uk" and perform search the result page comes up as Yahoo.
The machine is getting a bit sluggish and doesn't seem to want to load pages very quickly.
I believe that this may be Malware.........any thoughts? (and if it is what should I do)
Thanks