Lock down the corners
Solution: To prevent the Charms bar from showing on the right, and the Metro navigation thumbnails from showing on the left, you have to find this oddly hidden dialog box. On the old-fashioned desktop, right-click an empty spot on the taskbar and choose Properties. Then click the Navigation tab.
To turn off the hot upper right corner, uncheck the first box. To turn off the hot upper left corner, uncheck the second box.
The next slides discuss other options in this dialog box, which aren’t as obvious as you might think.