I am surprised that the windows and FN button do not work, because they are two system buttons from Microsoft. Maybe the problem is because you are using a pirated version of Windows and these buttons have been automatically locked. Some people have experienced this problem because of using a pirated operating system, but after buying a key to activate windows here mylegitkeys.com, the buttons worked again as they should. If you have a pirated operating system, it is better to buy a licensed one.