I knew what the Happy99.exe worm was and when I found it in my "file manager" I was going to delete it immediately and in my haste to highlight it in order to delete--I must have clicked twice and opened the damn file instead. What you see then is fireworks, it looks innocent enough. But that was an interesting question, how does a person know when she/he has the "worm"?? I don't know!! But I'd like to find out too. I suppose when you run your anti-virus program that I assume everyone has, it will show up or alert you in some way. Anyone have more info? Judie