I used to have "Fn+Right arrow" to switch keyboard light in different mode, off->auto->on. But after updated some DTP application, it doesn't work any more. I still can use DTP application to turn it on / off. The other key combination (Fn+Up, Fn+Down etc) are working. Right arrow key function correctly as well. It should be bios related, since all other Fn keys are good even before windows boot up. How can I fix this issue? Thanks!