I desperately looking for an answer... In the taskbar the icon for windows explorer is "pinned", however somehow when I click on it it opens but only as a very small screen and i cannot maximize it. It seems as it is hidden somewhere.
I am not sure how to describe it better. Would be nice to paste a screenshot, that would explain it more.
Sounds like it is appearing off screen. Check around the edges of the screen for it. Also, right click the desktop and click Screen Resolution. Make sure it only shows one screen as being connected and in use.
You could also try clicking the Show desktop button in the bottom right-hand corner. If you have all the animations turned on, you should see where its going to/coming from.