Skype infecting Windows PCs!

BBC reported that SKYPE has been used by hackers to spread Windows PCs through a worm. If the user clicks on an instant message saying "lol is this your new profile pic?" this would download a trojan horse containing the worm inside it. This can result in a user logout and locked from the machine. Hacker could use this situation for demanding money from the victim to release the computer. Further more the worm will send more "lol" messages to the contact list of the user and in most cases this will probably be opened by the recipient thinking an actual message from the user. That will also result in automatic downloading of the trojan horse file.