When i start up my pc i hear windows 7 startup rarely

[Richez]

Hi when i start up my pc i will rarely hear the windows 7 startup sound right before the windows 10 loading screen.
Is it because the windows 7 os is still there after i upgraded to windows 10?

 

[Colif]

You only likely to hear it after a restart, it seems the sounds are meant to be off by default (or it could be my speakers are normally off until after I start PC) as they weren't working at all at launch. Its possible you have the sound still because you did an upgrade and it saves your user settings.