Auto Hide A Key Taskbar Will Not Display When New Internet Page Is Opened.?

Taskbar will not display when new internet page is opened.? - auto hide a key

I was a cleaning keyboard when in the taskbar disappeared. Well, if I open a Web page, the taskbar disappears and I have to press the Windows key, so that it has been submitted. I have to click right on the taskbar and make sure that the self is not hidden and it has not failed to show at the top. Another idea how to get this protection?