TOSHIBA SATELLITE C660-125?

i tried turning my toshiba laptop but it didnt turn off i turned it off just after i downloaded imvu and went on boombang my laptop been acting strangely really slow ect wat should i do i tried shutting it down but it said "installing 3 updates" and it turned off then i tried again and it doesnt turn off the green light is still on wat should i do plz help! do i need to go to a IT person and get it checked