Unknown audio playing upon system startup

Hi,
I’m running Win 8.1 on an HP Envy Laptop, running Norton Internet Security Ver: 22.7.1.32.
I’ve recently noticed that when restart or shutdown/start my machine I get ‘radio like’ audio playing in the background while the system is still starting?
I’ve done my definations updates and full system scans and haven’t found anything wrong.
I’m guessing this is some kind of malware, but not sure how to proceed.
Is this the right place for me to post this.
Thanks, in advance,