Arduino UNO R3 installation problem in Window 8

Hey guys, ..

I've recently bought a new laptop with Windows 8 installed on it. Now when I open Device Manager and try to update the unknown device(arduino UNO board) the Windows shows the message "Windows found a driver for your device but encountered an error while attempting to install it.
The third-party INF (!!!) does not contain digital signature information."

So please, is there anyone who can help with this problem ?

Microsoft is here to help you. Look here.