Sorry to hear about this issue. I'd guess that maybe there's the regular AllShare application installed on your computer, and both AllShare Play and AllShare are running.
I am trying to get AllShare Play setup between my computer and my new Samsung Smart TV (Model UN40ES6100). I downloaded the Samsung AllShare Play software on to my computer and I can see all my files. However, when I go into the Smart Hub and AllShare Play icon in Videos, Photos, and Music it seems that it is showing my computer twice. One with just the computer name such as [PC]Computer Name and then another time with the e-mail address of my Samsung account such as PC_e-mail address. The one with the computer name doesn't says there is no content and then the one with the e-mail address shows all the content. How come I have two and can I get rid of the one that doesn't show me the content.