A couple months ago, I sent my laptop to Dell to be repaired, and when it came back, everything had been uninstalled so I used the disks to get everything back reinstalled, like the webcam and all that. Before I sent it off, all the buttons on the top row would bring up an icon on-screen when pressed. For example, the F3 button would display how much battery I had left, F7, F8, and F9 would bring up the sound icons, and while they still do what they're supposed to, the icons don't come up anymore. How do I fix this?