Have you ever received a call from someone claiming to be from Microsoft with information about your computer being on the verge of crashing?  They claim to be the authority and say that they need to make you aware of your computer problems.  They direct you to open your computer's Event Viewer log files by asking you to use the run line and enter: eventvwr. 

At this point, they try and scare you into thinking there really could be some problems by showing you the red X critical error messages that EVERY event viewer will have!  Next, they will ask for money or try and direct you to a screen sharing tool so that they can access your computer.  DON"T DO IT!  My suggestion is to play along until they give you a key that provides them with access to your computer.  Write the number down and hang up.  You can report this fraudulant activity to the company that hosts the website that they were trying to use to access your computer.  They key will allow that compnay to disable their account and report the fraudulant activity to the proper authorities.