How to Silence Your Computer's Startup Sound and Boot Like a Ninja?
Silence or Change the Startup Sound in Windows
Luckily, Windows gives you a number of easy options for tweaking your system's startup sound. To tweak it:
1. Click on the Start menu and type "personalization" into the search box. Hit enter to go to the Personalization panel.
2. Click on "Sounds" to enter the Sound preferences.
3. Uncheck the "Play Windows Startup Sound" box at the bottom of the window. Hit OK. When you restart your computer, it shouldn't make any noise when you log in.
Alternatively, you can scroll down the "Program Events" window and find "Windows Logon". From there, you can choose a different sound from the "Sounds" dropdown list, or hit Browse to choose one from your system. It won't silence it, but if you just want to change it to something a bit more subtle, you can do that here too.