Safari has found a trojan virus (e.tre456_worm_osx).
I thought I was updating my flash player, but apparently instead I installed malware on my iMac. Now whenever I start Safari, I get redirected to a page that looks like it is trying to be Apple Support, but wants me to call (and pay I am sure) to get this virus removed from my computer. I also get this popup notice, "Safari has found a trojan virus (e.tre456_worm_osx) on your Mac. The website I am directed to is http://apple.com-systemnotice.com. Any suggestions would be appreciated.
dd
MacBook Pro, OS X Yosemite (10.10.1)