Be warned Emma Watson fans. If you're searching online for the "Harry Potter" star online you may end up at a malicious site.

According computer to security firm McAfee, Emma Watson is currently the "most dangerous" celebrity to search for online. Watson has topped the list of hot bait among cyber criminals seeking to lure unsuspecting fans to sites to trick Internet users into downloading malware or even sharing private information.

McAfee says users have a one-in-eight chance of landing on malicious site when searching online for Emma Watson.

Following Watson on McAfee's Most Dangerous Celebrities study is Jessica Biel, Eva Mendes, Selena Gomez, Halle Berry, Megan Fox, Shakira, Cameron Diaz, Salma Hayek and Sofia Vergara.

PC users should be familiar with protective security software. McAfee and Norton are heavy hitters, but there are some free options that perform well enough for most. Certainly, something is better than nothing. The free version Avira AntiVir Personal is highly regarded.