Actress Emma Watson poses at the gala presentation for the film "The Perks of Being a Wallflower" at the 37th Toronto International Film Festival September 8, 2012. (Photo : REUTERS/Mike Cassese)

McAfee has declared Emma Watson to be the "most dangerous" celebrity to search online as search results may contain malwares.

Since 2006, every year anti-virus company McAfee releases a list of the "most dangerous" celebrities that are searched online. The list contains names of celebrities which when searched online may lead to websites containing virus, malwares and Trojans. This year Harry Potter superstar Emma Watson tops the list. "That's because fans checking out websites devoted to the 22-year-old stand a 1-in-8 chance of picking up a computer virus." says online security company McAfee Inc.

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McAfee says searching for the actress' name combined with "free downloads" or "nude pictures" or "fakes" gives you a 12.6 percent chance of  landing on a website that unloads spyware, adware, spam, phishing, viruses and other threats.

"Hot movies and TV shows, awards and industry accolades seem to be more of a factor than headline-grabbing activity," says Paula Greve, director of web security research at McAfee.

Other celebrities on the list in order of appearance include Eva Mendes, Selena Gomez, Halle Berry, Megan Fox, Shakira, Cameron Diaz, Salma Hayek and Sofia Vergara. Jessica Biel was was No. 1 in 2009 and No. 4 last year came in at the second spot.

Other than that the 22-year-old "Harry Potter" starlet is making a major transition from her role as young hero Hermione, to Sam, the first love of 15-year-old Charlie in upcoming film The Perks of Being a Wallflower.

"Nobody has ever seen her in this kind of role-and with an American accent," costar Nina Dobrev said of Emma Watson at the film's premiere held during Toronto International Film Festival.

"She finished one chapter of her life, cut off her hair and embraced this new beginning. I think everyone is going to be very pleasantly surprised," Dobrev said.

"It felt pretty exotic to me. It really did. It was a very voyeuristic experience," Watson said in an interview in Toronto Sunday, according to The Associated Press.

"Getting to go to Friday night football and Olive Garden, school dances and all of that stuff. That was really another world to me."

"There are some parts of me that feel very old, and then there are other parts of me that are, like, I have a sense of my own arrested development," Watson continued.

"I hope what they can see is that I am able to transform, that there are other sides of me that perhaps they haven't seen yet, and that they might allow me a little bit of room," said Watson.

"I mean, just doing American really is different. People have said to me that they keep forgetting it's me when they see the movie, which for me is more than enough. That's a success in itself for me, really."