When you install hamachi there is an option box you can check or not check. I dont remember exactly what it says but it says something along the lines of click this for extra windows protection or something. Anyways it is the only check box in there and if you check that it will not let you connect to each other. Also make sure your firewalls arent blocking it. I think windows firewall needs to be off. Also when you bring it up make sure your in the same network obviously and then ping each other by double clicking on his name or by right clicking and hitting ping. If it says request timed out your firewall is probably screwing it up if not probably something else. Good luck
