I do not know how it is run by the JPG and GIF files, but I do know that the code somehow loads into the image viewer itself..I am not sure how it works, just that it is very destructive.. I had it destroy my 486 (using Lview Pro) Oh, well, ENOUGH already. if you have something to say that is related to "image files cant execute a virus" please do not. there are too many spams with those ideas out now