Attacked.

It seems that our laptop has been attacked by a virus, a spyware or something. I was doing a layout when suddenly a sexy woman icon in a blue lingerie appeared inviting to visit a pornographic site. I right away called my brother as he was the last one who used the laptop. He said he's unsure that he might have clicked a link a while ago. I told my brother to find a way to fix this. If not, he can't touch this laptop again ever.