Hey guys, this mac 10.9.5 2.5GHZ i5 4gb Serial no. CPWKV1A6DTY3 has some issues, first when you power on and it goes to desktop, no programs are showing at the bottom of the screen so the desktop looks blank with only the background wallpaper and the usual top toolbar showing. Also, when you go to the net and try to go from one website to another or try to access any of the site's features, it redirects to a "Mackeeper" page, I am guessing this a virus? If so, how can I best it back to normal please?