I know this problem is quite common but I just could not get multimedia keys and volume keys to work (the ones above the F keys, next to the power button)
I have just upgraded my VGN-CS11S/Q to Windows 7 - 64 Bit. I have updated the FEPD driver via windows update, and installed the utilities in following order:
Sony Shared Library [reboot] Vaio Event Service [reboot] Setting Utility Series [reboot] [reboot] [reboot]
but no luck. Than, I have reformatted the system (actually, I have restored the image file, but is was a clean installation without any utils / drivers anyway) and installed the utilities in another order as follows:
Vaio Event Service [reboot] Sony Shared Library [reboot] Setting Utilitiy Series [reboot]
still no luck. FN keys does work, and little OSD screen comes up as well when I use FN + volume up - volume down keys. But multimedia keys and volume keys (which is the one with lights) insisting on not working. Any solutions?