Capslock and shift problem

[Tharbad]

Hey,

I have a problem in my laptop with Capslock and Shift:
- Shift sometime acts as capslock (When I press it, caps led will turn on and I get Caps)
- Capslock randomly turn itself on.

OS: Windows 8.1
PC: Samsung ATIV 700

How can I get normal Shift and Caps?

Thanks