This is a script that you can configure to play any .wav when you startup your Computer using Task Scheduler. The tutorial with pictures is available below!
After you've cloned/downloaded the script you have to change the destination of your wav file in the .vbs file with a text editor(if you don't have one just use notepad).
Search for Task Scheduler in Search and run it.
Give it a name,description(optional) and in the drop down menu "Configure for" select your Windows version.
Go to triggers in the bar, then click new and from the drop down section named "Begin the task" select "At startup"
After that select "Actions" in the bar and create a new action. Action should be set to "Start a program", on the program/script section browse the script you downloaded from the repo named LogOnSound.vbs.
After you've done that just clik ok and ok and you're set.