I was removing bloatware from my vaio laptop and somehow i ended up with the keyboard shutting down the lights a few seconds after i clicked a key. Going to start > Control Panel > Vaio Control Center did nothing when changing the Keyboard and Mouse settings to keep the lights always on.
The solution? I accidentally disabled the service called VAIO Event Service, which manages the event flow between the hardware and the VAIO control center. So i enabled that service by typing services.msc in the search box of windows, and regain control of the backlit functionality using the vaio control center.