I have 2 Windows Vista machine and a Directv HR20 and also a XBox 360 devices on my home network. I dont know for sure how did the WMP11 sharing was working on 1 of the Vista machine but all of a sudden it has stopped working. Media was shared to all the 3 devices without any problems. I even checked under media sharing that all the devices were just fine with the allow checkbox that were ticked on all the devices. When I was doing some troubleshooting then I removed all the 3 devices and also other users of this computer. The devices didnt come back but other users came back on this pc? So it seems to me that these devices are not communicating with the Vista pc. Firwall is also turned off, so can anyone give me some fix for this problem?