I normally run Linux and Mac, but on my server I have some Windows guests that I use for various testing.
You don't give so much details to your network setup, so I will have to makes some assumptions along the way.
My setup is as following:

I tested on 3 images.
Windows 7 Ultimate
Windows 8.1
Windows Server 2003
Since the guests are normally NAT'ed at the server and do not normally get an external IP, I re-configured them with Bridge networking so that they will get an IP from the Almond+ instead.
Since the network changed, by default both Windows 7 and Windows 8 assumed the new network was insecure, so I had to also configure the firewall to trust the network.
However, after this, I was able to connect to all of them without any issues.
So I suspect that it is a firewall issue on your end.
One reason could be that many routers by default use the 192.168.1.0/24 range, and by default the Almond+ use 10.10.10.0/24 both are valid ranges for a local network, but perhaps Windows thinks that the new network is not secure and enables the firewall, and therefore you are not able to connect.
Check your network setting on the Windows computer under Network and Sharing.