Problem installing assasins creed 3?

I just bought a new laptop its the lenovo z50-70 and i t'm trying to install assasins creed 3 and while installing it says error unpacking unarc.dll returned error code: -6
what's wrong?! I just bought this laptop like an hour ago!

Hello… Since the laptop is brand new, you probably have to do all your windows updates, install flash player.a java runtime enviroment, direct x etc before try to install any games… Cheers

This error is more likely to be because of corrupt files when you downloaded Assasin's Creed 3.

Read all the information in the following link:

http://jai-fixyourpc.blogspot.ca/2011/09/unarcdll-error-while-installing-large.html

How do i run assassins creed 3 bu RG mechanics setup on my lenevo notebook