I downloaded the unity web player so I could play a game that runs on it but every time I go to play the game it says the plug-in is unresponsive and I have to end it.
Try the suggestions at: How I do re-install the webplayer when it fails to work? - Questions & Answers - Unity Discussions. If uninstalling, rebooting, and installing from the downloaded installer fail to get you up and running, let people know what game it is you are trying to play, what browser, and what OS.