Web player install problem

How do i install Unity Web player when the application won’t start and i’ve already looked in my programs and its no where to be found, so Its already uninstalled?

I don’t think you really understand the web player, it’s a browser plugin, similar to Flash. To download, go to http://unity3d.com/webplayer. You’ll still have to build to the web player… try this and this if you’re unfamiliar with building and deploying to the web player.