online scanner

one day i was clicking on the the website and there a pop up say I had a virus and trojan horse that Norton is unable to detect. and i got scare and i download it. now my laptop it seem run fine, but sometimes when i click on the website, it not that website it have some random website.. is like i was clicking on dramawiki link but the website it come up is http://www.yellowpages.com/Mckinney-TX/Tanning_Salons?from=amp_kcg_Tanning_Salons_Mckinney-TX
i so worry right now.. am i in trouble??

Please use your topic here:
http://www.geekpolice.net/virus-spyware-malware-removal-f11/malwarebyte-s-anti-malware-t17054.htm

Thank you.