Alter Startup and Shutdown Audio

Turn your computer on and log in if necessary.

Enter the 'Sounds and Audio Device Properties'.
Click on the start button, and navigate your mouse to the 'control panel' icon.

Find the 'sounds and audio devices' icon and double click on it.

Choose the second tab along labeled 'Sounds'. You will see the windows
events on the bottom and a drop down list of preinstalled sounds.

Choose any sound that you would like from there the drop down list, or
click on the 'browse' button and point the event to this other sound
file (.wav extension files only).

Once you're happy with your choices, click 'Apply' then 'Okay', and
enjoy your new sounds.