Sony z1, Use pc as internett source

[SirSletten]

I have been googling like a wild pig for hours now to try to find someway to use my pc as internett source. 
but i only find "how to use z1 as internett for pc", anyone know how to gain internett on my mobile using Usb to my pc that is connected to the internett? . my old HTC had a simple button after plugging it inn. 

[Uliwooly]

You will have to root your Z1 > install a reverse tethering app