Ok, I have never EVER used one because I dont want to invite demons in, but... I watched a video online, of people using it and my computer got a dead battery sign so I plugged it in, All of a sudden the screen goes out, but the sounds still playing, then the hole computer shut down, I had it plugged in. And I kept hitting the "power" button and it wouldent turn on, So my cousin and me ran down my my sisters room, and told her what happend and she said I might have a virus. But I went back upstairs turned my computer back on and the video started playing again...... By me playing this video I diddent think that would happen because I diddent invite demons in. But still.... freaky anyone have experience I dont believe in the boards but i dont know either... Maybe the computer shutting off was a sign to stop watching the video.