
When the Xbox 360 starts up, it goes through the initial white screen where it says "Finding Windows Media Center PC" and then "Downloading", then it switches to the black WMC screen where it says "Connecting" but then it times out and gives the above error.
It happens on both of my Xbox 360's I have set up as Media Center Extenders. A fresh restart of the HTPC will resolve the issue temporarily and allow me to connect using the extenders just fine, but within six or less hours, I have the same problem when I try to connect. Restarting the Xbox 360's will not fix the problem without a hard reset of the HTPC. I do not have any firewall software other than the built-in Windows Firewall. I have had my HTPC running Windows 8 with WMC without any problems for two and a half years, and I have had two Xbox 360's acting as extenders for the last two years. The network is hard-wired ethernet.
I have searched online, and based on what I found online, I have tried the following:
-Delete the Media Center Extenders from the HTPC and reconfigure them.
-Delete the Media Center Certificate (so a new one is generated)
-Ensure that Windows Media Center Service is running and is set to start "Automatically". I have also tried stopping and restarting the service. All dependencies were also verified to be running and set to start Automatically.
-Ensure that UPnP Device Host is set to start "Automatically" and is running.
-Connect via WiFi.
-Reserve IP addresses for all devices.
-Ensure UPnP is enabled on router.
-Swap out a different router.
-Ensure Media Center Extenders was under Allowed Applications in Windows Firewall.
-Completely disable Windows Firewall
-Ensure "Network Discovery" is turned on in Networking settings
-Ensure Xboxes were allowed Media Streaming under Network Settings.
-Windows system restore to a couple months ago.
My workaround so far is to have the HTPC automatically restart every morning at 4:30 am so that when I get up in the morning, the extender in my room will function, but when I get home from work, the issue happens again, and I have to reset the computer. It's a bit pesky, especially if I need to restart the computer but it is in the middle of a recording in the evening. Based on what I have found, I concluded it is probably a system process that is crashing, given that it stops working after a couple hours and is fixed by a reboot. I don't think it's the network because I have swapped out routers, and I don't think it's the Xbox because it happens on both of the ones I have.
Does anybody have suggestions for other things to troubleshoot for this issue? I really don't want to have to do a fresh re-imaging of my setup. Any help is much appreciated!