my toshiba laptop is frozen!!

I was on AOL that I had just installed (and AIM) but then it said error so it shut down.. and then I went to uninstal AOL and i left-clicked and the thing froze but the mouse was still moving so i hit CTRL ALT DEL and it took 5 minutes for the end page to show up and it said
“Explorer (not responding)”
so I hit End Task and it took 5 minutes to say “Ending” and now the mouse is moving 1 cm every 5 sconds when you try to use it and thee is no simple “Power” button and I cant get it to restart.. and a friend let me use it!!
PLEASE HELP!!!