Computer Keyboard Trouble

So my keyboard has some of these snazzy hot keys that open Internet Explorer, My Computer, and a set that manipulate Media Player. But right now they've decided to stop working. The rest of the keyboard works fine so I think it's just a matter of reminding my computer that they exist.
Except I have no idea where to start.
This mouse/keyboard set didn't have software, and before these extra buttons would just work straight away.
So, any help? I'm not sure what make they are either. It's part of a wireless set from Dell, came with the computer. Any ideas?
Except I have no idea where to start.
This mouse/keyboard set didn't have software, and before these extra buttons would just work straight away.
So, any help? I'm not sure what make they are either. It's part of a wireless set from Dell, came with the computer. Any ideas?