System WindowsFirewall: "query user incoming"

Or just Windows Media Player Network Sharing failing over mixed network on Windows 7, by default if you are on the same subnet it'll work. I had Xbox on 192.168.0.250 and sharing it on to my Wireless network of 192.168.1.x range, so I was getting the above error. I had to go to Windows Firewall in Control Panel, click Advanced Settings, Inbound Rules. "Windows Media Player Network Sharing Service (HTTP-Streaming-In)" This is running on Port 10243 and enable the one for "Public" profile. Then you should be good to go.