Are you such a freak when it comes to viruses as well, because this might be the result of a virus and not just a simple bug. You should double check your computer before you do anything else, and I am sure that this would not be hard for you. It is always easier to check something that is close to you, before you accuse something that is away from you and out of your control. Also, maybe there is something wrong with instances and this would not be the first time that I heard something like this. You need to spend some time to make this right.