The solutions to ASUS S200E series keyboard problems are as follows:
Problem Solving-->Enable the numeric keypad.
The problem is not solved-->Check for viruses.
Problem Solving-->Caused by virus problems.
The problem is not solved --> Try reinstalling the operating system.
Problem Solving-->Operating system problem.
The problem is not resolved-->Contact ASUS service center for testing.
2. The shortcut keys are invalid. Reinstall the ATK power management driver.
Problem Solving-->Driver problem.
The problem is not solved --> Try reinstalling the operating system.