I have a WDTV Live media streamer, and when I first installed Windows 7, they could easily find each other. The WDTV could access shares and stream from them, or i could right click on a media file and select "Play to" on Windows 7 and it would play it.
However, I must have disabled something - because suddenly the "play to" disappeared. The WDTV can still access the shares, so no big disaster.
Then I looked at "Network" in explorer and noticed that the WDTV Live was listed under "computers" - instead of under "Media devices" - I thought it would be ?
The WDTV Live also has USB inputs and if you plug something in you can chose to share it via the network as a sort of NAS. I thought that might be why Windows 7 thought it was a computer, and so I disabled this sharing on the WDTV live and rebooted Windows 7 - but now the WDTV Live has totally disappeared from Networks.
It can still easily find the Windows 7 shares. But I wonder why it disappeared from "Play to" - anybody has any idea how this can be repaired?