I am running iTunes 10.1.1.4 on a Dell with XP. Apple TV, a new product, can't display the contents of iTunes Library, when the PC is connected by an Ethernet cable to the network Router, however, a Laptop, running Windows 7, operating wireless with the Apple TV, works just fine. The Apple TV is working wireless to the Router. I have disabled the Firewall, removed Anti-Virus, and Security software but can not get the iTunes Library to be recognized by Apple TV.1 person got this answerI do too

I had 4 conversations with Apple TV Senior Advisors, followed all their suggestions. It seems now that the problem is with Windows XP. That is where I am now.