After installing Windows XP on the VGN-FE31H, the screen brightness keys (Fn-F5 and Fn-F6) no longer work. To make them work again you need to install some of the utilities that ship with the laptop, which are also available in the
FE3_Utilities.zip download from the Sony web site.
The three utilities are:
- Utils Installer 1 SonyUtils DLL
- Utils Installer 2 Sony Shared Library (this one needs a reboot)
- Utils Installer VAIO Event Service
The “VAIO Event Service” needs to be running for the keys to work.