Another awesome tip from AC.
[from this post: Telling your virtual machine to stop beeping and shut up! ]
… See, I configure all my virtual machines to not have a floppy drive and no sound… so when there’s a system alert/prompt, I get the standard system beep. That gets REAL annoying after the first 2 beeps, and it occurred to me that some people may not be aware that you can disable the system beep using two simple commands.
Open a command prompt and enter the following to stop the system beep:
C:\net stop beep
While this works, the beep will be re-enabled the next time the machine is rebooted. So what you want to do is configure it to never start back up:
C:\sc config beep start= disabled
Be sure to leave a space between the equals (=) sign and the word “disabled”.