Hello, I recently purchased a NP900X3C-A02US on Ebay, which came with Windows 10 installed. I have been able to download Samsung's SW Update tool and get all the drivers installed, including the Samsung Settings app - which enabled the volume and keyboard back-light functionality. Unfortunately I am still not able to control the display brightness from my keyboard (F1 & F2 functions). I can change the brightness from settings, so I'm confident it's not a driver issue. I can also confirm the keys work using a keyboard testing app. How can I get these brightness keys to work? Does anyone with the same laptop model have them working on W10? Thanks in advance!