I have been reading with interest Optic-Flare's thread. I did notice there seems to have been no resolution. I cannot get my two XBOX 360's to communicate (via hard wire) to my WMC7 PC. Three things I have noticed: 1) Xbox Live connections work fine, 2) the Media Center Extender Service can be set to AUTO and Started (along with the other three vital services - but upon reboot it (the MCExtender Service comes back as a default "disabled" and 3) both Xboxes communicate OK with a PC running Vista Home Premium using the same network. I have tried about everything I've read and after three solid days of not getting past the "configuring Computer" and NEVER past the "searching for extender" I am close to reinstalling Vista back on this PC (I hate to even think of doing that!) I have tried many times turning off and on the Windows fierewall and AVG anti-virus. I would appreciate any advice before I terminate this endeavor. Thank you and Greetings from Texas! Pat Patrick Grand Prairie, TX One other thing of note: When checking the Event Log: Everytime I try a connect it shows an "Error 538: MC Extender setup failed as the extender was detected on the network but the UPnP search for extenter failed (timed out after 20000ms)". I have a D-link router and UpnP is enabled along with multi-cast.