The internet iz dangerous.

I came across another virus filled site (again) and thank fully it was usuing the same trick as the my first virus attacker so i clicked 'no I do not want to download' then it said '! Download full movie!' then I just turned off the computer. I turn it back on and the screen is still there! I was all shoot, what do I do?! Then I was all duh.... *control alt delete bye bye ^-^*