My Roku has been happily streaming music from my PC running Media Center. Suddenly, when I try to play anything, the albums, songs, etc. are retrieved, but when I try to play a song, I get the "unable to play" error. I have tried resetting the Roku as well as unplugging and plugging power, but no change. I saw a similar thread from 2010, but there was no response or solution to the poster's issue. I'm hoping there is a simple fix. The Roku is a bit cumbersome to use, but it works for my needs.