how to get my volume meter back

[nauc]

dont know what the heck happened, but whenever i use to hit Fn Page Up or Fn Page Dn, a volume meter would pop up and show me exactly how loud i have my computer turned up but now it doesnt do that

anyone have any ideas how to get this back. its been a couple weeks so i cant do a Restore point because too many restore points have been created so the older ones are gone

ps, im using Vista Home Pre off a Dell notebook

thanks