Anyone here an Apple TV guru?

[Catlover827]

I am pulling what little remains of my hair out. We have had Apple TV (the newest version, I guess) for a few months now. It has worked fine for the most part, but now it isn't working, and it's driving me up the wall.

I have the latest version of iTunes on my Windows 8 PC (I don't think it's a Windows 8 problem because it worked for a while). Over the weekend we tried repeatedly to watch stuff using Apple TV. ATV says it's connecting to my library, but then stops and says I need to make sure Home Sharing is turned on (it is), that I have the latest version of iTunes (I do), etc. I have visited the Apple support forum and have tried EVERYTHING recommended, to no avail. To wit: I have tried setting my IP address to 8.8.8.8. I have turned Home Sharing on and off and on again about 20 times. I have tried resetting ATV. I have tried restoring ATV. I have downloaded ATV updates. I have tried resetting my router. I have tried unplugging my router. I have tried unplugging ATV. I have tried changing the PC power settings so that the display never turns off. I always leave iTunes open. NOTHING WORKS!!!!! This is very aggravating!