For a long while now groups have been targeting p2p networks like bittorrent and the priratebay. They flood the market with all kinds of fake videos using the latest movies out there. Harry Potter is no exception. Over the bast few weeks many such groups have been using blackhat techniques to get high search engine rankings for Various Harry Potter keyword terms. One of the most important phrases targeted is "Harry Potter and the Half-Blood Prince". In a nut shell. Fans will download a copy of what they think the movie is. Then once they place the movie they will be asked to install a video codec or movie player. the one that is currently being seen for Harry Potter and the Half Blood Prince is called streamviewer.
There are legit programs out there using this or a similar name so do not get the two mixed. This fake Streamviewer program looks like it is installing a video player or codec but it is really just downloading trojans and other spyware onto your computer. There is an easy way around this. Don't pirate movies and music. It's not the answer many wanted to hear but it is the truth. As always these types of infections can even make it onto your computer when visiting a legit site.
The nine ball virus that just hit 40K websites proves this. As always staying protect and taking proactive measures is always the best solution. If you do not have protection then consider downloading a free trial of Spyware doctor with antivirus here. It's good stuff and what we use and recommend heavily on this site. For those that are already infected you will want to ensure you remove these trojans ASAP. If you were reling on a free client for protection then that is why you most likely got intfected in the first place. We do recommend you scan your computer with SpyHunter. If you are not tech savvy or just tired of having to deal with the virus and nothing seems to be working for you then considerPCNinja.com. They charge 129 bucks to remove all viruses and spyware. It's well worth the price and this is half of what any in home computer repair company would charge.
Other Resources:
http://katabudi.blogspot.com/2010/07/how-to-remove-virus-shortcut-harry.html
http://www.security-faqs.com/how-do-i-remove-the-harry-potter-virus.html
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