Virus on Facebook?? Please Help :(?

[Sissi Nguyen]

4 days ago I accidentally clicked a link "omg...i really hate Rihanna after seeing this video" or something like that on Facebook. I didn't mean to click that link because suddenly my laptop is very slow. and i mean slow. it hardly moved. I tried to moved the mouse and clicked on the screen. That's why I clicked that link. Then it automatically posted that link on my wall and tagged my friends. I tried to deleted it but it didn't work. It kept on posting and tagging. I didn't know what to do so I deactivated my Facebook for a few days. But today I reactivated my Facebook and it happened again. Please help me. It really annoys me Thanks.