All I can think of at the moment is to make sure webslingplayer is actually not running. (task manager)
(I don't have windows 8 - assuming they have task manager still so however you get to it)
Otherwise it sounds like whatever webslingplayer is installing is trying to be accessed by slingbox.com.
(I don't have windows 8 - assuming they have task manager still so however you get to it)
Otherwise it sounds like whatever webslingplayer is installing is trying to be accessed by slingbox.com.