From Whirlpool's KB article on the Dell Studio 1555:
The media buttons are switched on by default instead of the F keys so to perform a task such as closing a window (Alt-F4), you are required to press Alt-Fn-F4. To reverse this function, it is necessary to go into the BIOS.
I've tried using the Boot Camp drivers, but it was in the Mac .dmg format and I couldn't open the package. When I finally got around to opening it, all I could do was install the entire Boot Camp package -- which I didn't want to do considering it might overwrite drivers and make a royal mess. All I wanted was keyboard and the only thing I ended up with was a 32-bit package (couldn't find the 64-bit keyboard package) so I ended up using RandyRants' SharpKeys and AutoHotkey. I use them both anyway.
I have an Apple Pro Keyboard (graphite) and use it in Windows Vista -- I use Randyrants.com's SharpKeys to map:
F13 -> PrintScreen
F14 -> Scroll Lock
Left Alt -> Left Windows
Left Win -> Left Alt
Right Alt -> Right Windows
Right Win -> Left Alt
(since the Win key belongs between Alt and Ctrl)
The only thing SharpKeys can't do is Pause-Break, which appears to use a three-byte scancode which native Windows key-remapping can't handle (it'll just fire NumLock instead)
For Pause-Break, I added a definition to my AutoHotkey ahk file:
F15::
Send {Break}
return
The Eject key still doesn't work -- this seems to be a special key handled differently, as Eject can be used before an OS is even running.
ymmv, especially on newer Apple keyboards. As long as it produces a scancode, SharpKeys should be able to do it. The only troublesome key is Pause-Break.
SharpKeys is here : http://www.randyrants.com/2008/12/sharpkeys_30.html
Best Answer
Go to Control Panel -> BootCamp. You should find an option called "Use the F1-F12 keys to control software features" under keyboard tab.