Use your recovery CD and select any applicable s/w to drive the kybd. -OR- verify under the control panel->system->device mgr.-> what the properties are for the kybd. or reload them with Sony supplied s/w. If no CD, then try thier support website for s/w or more detailed info.
ood luck -----Willy
There is a "Fn" key on the lower left of my keyboard. This key used to be used with some "F" keys on top of the keyboard. I used to ajust the volume of my speakers just by holding down the Fn key and the F3 or F4 keys. Now it does not work anymore. Nor does any of the blue f-keys. How do I fix it?