I tried everything on that page and nothing helped (it was stuff i already know). What's really weird are those empty spaces. they do not work AT ALL. Some icons are from windows like network and some others are 3rd party like team viewer and Steam (both of those do not work)
Sorry if you mistook my comment as a criticism of your English skills. When you mentioned the task bar I was expecting to see the Start button somewhere in your image.
Sometimes Windows won't properly resize the System Tray object properly as icons are removed and so you will encounter the problem you have just experienced. Usually a shutdown and/or restart is all that is required to resolve the problem.