Switch on quitely

Has your child ever been awakened with the loud "Ta-Daaam!" sound your laptop played when you opened it at late evening? Have you ever opened notebook on public meeting and the computer loudly notified everybody about your new messages or something? I bet you wanted to smash the computer into smithereens then! Each time this happens to me, I promise myself to disable the sound before logging off, but I always forget about this in few minutes.
Software making a computer quiet when it's turning on


This is quite late (at my side of the world), I couldn't make up a story for this so I just copy everything from the source. Well, at least I make my own screenshot.