Fn keys problem please help me

[rankn]

I have a problem with my Fn key, the other keys are working but the combination of the speaker doesn't work. i have also a problem with my (fn+F3) it also dont work.

 

[kookie3010]

I have a problem with my Fn key, the other keys are working but the combination of the speaker doesn't work. i have also a problem with my (fn+F3) it also dont work.

Did you recently updated your os?(xp to vista,vista to 7 or 8)