Hello,
My laptop produces a continuous beep on start up and stops after loading. Everything work normally (according to me) but then why that beep sound? and how to stop it?
You might try looking at this: http/www.computerhope.com/beep.htm
It helps if you know the type of BIOS your PC has (or maybe UEFI?)
You need to press some key like F2 or F10 just after startup to get into the BIOS, or check the specification on line.