As far as I understand, you need to go to the control panel/network connections, select "advanced/advanced settings," and there you will see your connections (including Hamachi). You need to move Hamachi to the very top (there's a green arrow for that).
I know that.
The problem is different: there are 3 computers at home. Fiber optic cable is used with FTTB technology (meaning fiber optics go into the house). I need to be able to play Heroes over the INTERNET from two computers (and also have the internet working on both computers).