I'd to update my Windows 8 clock with the internet every time I boot the system maybe with a script that I set to be executed at system startup (like that option in the Date and Time window in the tab Internet Time > Change settings... > Update now).

The reason is that I'm having some problems with system cloak and the answer to this question would solve it.

Note: the option Synchronize with a Internet time server is marked and the time server is time.windows.com.

I have a laptop with Ubuntu and Windows 8 in dual-boot.