Try this and see if that's it.
Right click a blank area on the desktop> Personalize> Upper left Change desktop icons
See if the Network icon is what you are seeing.
If so, untick it and Apply and OK your way out. All my icons are custom, so I'm unsure if it is what you are seeing. If not, post a screenshot: Screenshots and Files - Upload and Post in Seven Forums
Right click on the icon and choose properties, post a screenshot of that as well.