panasonic toughbook cf-50 hotkey driver issues

i purchased this laptop a few months ago from a no profit company, i used this for work and thus wanted a cheap toughbook, my problem is our network got infected with a bad bug and i had to re install windows, i did not get any install disk with the unit, and now that i installed windows none of my function keys work at all, ive tried the search and Google and tried everything that i could find and i have installed downloaded drivers from Panasonic site, but i just cant get it working, whats the proper way to install them? perhaps im doing something wrong there, thanks for the help

 

Are they not working at all, or are they working as if the Fn key was continually pressed down, so in effect they are now multi-media keys? If this is the case you need to turn the function key off, which means either pressing Fn and one of the designated function keys (not sure which Fn key this is for the Panasonic Toughbook) or holding the Fn key down for a few seconds to turn it off.

 

they dont seem to be working at all, i tried what you suggested but i got no wheres, anyone got any more ideas?