[DTfan]

This thing keeping coming up from my virus proram saying that MS-LASS or something has just passed through my network. I use to get it a couple times at home and when I was using wireless I didn't get it at all but now I'm using the school internet it is happening more. What is it and what do I do? When it comes up it says that it recommends a virus scan and activating the emergency lock and I've scanned it almost everyday and nothing comes up but I have no clue as to what the Emergency Lock is or how to activate it. Anyone have any suggestions?